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Abstract:

A curtain assembly comprises a rotatable drive element wherein at least
one helical guide structure is formed on, or into, the outer surface of
the drive element. A drive attachment element having a structure that
communicates with the helical guide structure to move the drive
attachment element axially along the drive element when the drive element
is rotated. Specific embodiments incorporate either a manual or
motor-driven rotation assembly for rotating the drive element. Further
specific embodiments involve a helical guide structure that comprises a
helical groove and a structure that comprises a tooth that engages with
the helical groove. Further specific embodiments relate to a system with
linked horizontal drapery panels having varying characteristics that are
moved independently by a common drive system.

Claims:

1. A window covering assembly, comprising: a drive element having at
least one guide structure formed on or into an outer surface of the drive
element; a drive attachment element having a corresponding drive
structure that communicates with one or more of the at least one guide
structure to move the drive attachment element axially along the drive
element when the drive element is rotated about a longitudinal axis of
the drive element; a first curtain having a first end of the first
curtain and a second end of the first curtain, wherein the first curtain
is connected to a first driver, wherein the first driver is coupled to
the drive attachment such that when the drive attachment element is moved
axially along the drive element by rotating the drive element, the first
driver hanger clip is moved by the drive attachment; a second curtain
having a first end of the second curtain and a second end of the second
curtain, wherein the second end of the second curtain is attached to a
second driver, wherein the second driver is removably coupled to the
drive attachment element such that, when the second driver is coupled to
the drive attachment element, the second driver is moved by the drive
attachment element when the drive attachment element is moved axially
along the drive element by rotating the drive element, and when the
second driver is decoupled from the drive attachment element, the second
driver is not moved by the drive attachment element when the drive
attachment element is moved axially along the drive element by rotating
the drive element; wherein movement of the drive attachment element from
a first position on the drive element to a second position on the drive
element moves the first driver from the first position on the drive
element to the second position on the drive element, wherein movement of
the drive attachment element from the first position on the drive element
to the second position on the drive element, when the second driver is
coupled to the drive attachment element, moves the second driver from the
first position on the drive element to the second position on the drive
element, wherein movement of the drive attachment element from the second
position on the drive element to the first position on the drive element
moves the first driver from the second position on the drive element to
the first position on the drive element, wherein movement of the drive
attachment element from the second position on the drive element to the
first position on the drive element, when the second driver is decoupled
from the drive attachment element, does not move the second driver,
wherein moving the drive attachment element from the first position on
the drive element to the second position on the drive element and/or
moving the drive attachment element from the second position on the drive
element to the first position on the drive element, and coupling, or
decoupling, the second driver to, or from, the drive attachment element,
allows the second end of the first curtain and/or the second end of the
second curtain to be moved from the first position on the drive element
to the second position on the drive element and/or the second end of the
first curtain and/or the second end of the second curtain to be moved
from the second position on the drive element to the first position on
the drive element, such that each of three states can be achieved,
wherein the first state is the second end of the first curtain and the
second end of the second curtain are positioned at the second position on
the drive element, a second state is the second end of the first curtain
is positioned at the first position on the drive element and the second
end of the second curtain is positioned at the second position on the
drive element, and the third state is the second end of the first curtain
and the second end of the second curtain are positioned at the first
position on the drive element.

2. The window covering assembly according to claim 1, further comprising
a rotation assembly for rotating the drive element.

3. The window covering assembly according to claim 1, wherein the drive
element is a tube.

4. The window covering assembly according to claim 1, wherein at least a
portion of the drive element is hollow, wherein the outer surface of the
drive element has a circular cross-sectional shape.

5. The window covering assembly of claim 1 wherein the at least one guide
structure comprises a helical guide structure.

6. The window covering assembly according to claim 5, wherein the helical
guide structure comprises a helical groove formed into the outer surface
of the drive element.

7. The window covering assembly according to claim 6, wherein the at
least one corresponding drive structure comprises a tooth.

8. The window covering assembly according to claim 6, wherein the helical
groove is axially spaced between 2 inches and 6 inches from itself along
the drive element.

9. The window covering assembly according to claim 1, wherein when the
drive attachment element is at the first position on the drive element
and the second driver is decoupled from the drive attachment element, and
the second end of the second curtain is positioned at the second position
on the drive element, a user can move the second end of the second
curtain without rotating the drive element.

10. The window covering assembly according to claim 2, wherein the
rotation assembly comprises a motor.

11. The window covering assembly according to claim 10, wherein the motor
is mounted inside the drive element.

12. The window covering assembly according to claim 10, further
comprising a power supply for the motor, wherein the power supply is
mounted inside the drive element.

13. The window covering assembly according to claim 10, wherein the motor
is battery powered.

14. The window covering assembly of claim 10, wherein the rotation
assembly further comprises a control board and a wireless receiver that
can receive a signal from a transmitter to operate the motor.

15. The window covering assembly according to claim 2, wherein the
rotation assembly comprises a pull cord connected to the drive element to
manually rotate the drive element.

16. The window covering assembly according to claim 2, wherein the motor
is operated by a voice command into a transmitter or by key strokes using
a device selected from the group consisting of: a remote control, a cell
phone, a personal data assistant, or a personal computer.

17. The window covering assembly according to claim 1, wherein the first
end of the first curtain is fixed and the first end of the second curtain
is fixed.

18. The window covering assembly according to claim 1, further
comprising: a first cover track; a plurality of first hanger clips,
wherein the plurality of first hanger clips are attached to the first
curtain between the first end of the first curtain and the second end of
the first curtain, wherein the plurality of first hanger clips are
slidably interconnected with the first cover track such that the first
cover track supports a portion of the first curtain, wherein when the
drive element moves the drive attachment element so as to move the second
end of the first curtain each of the first hanger clips of the plurality
of first hanger clips slide with respect to the first cover track to
allow the first curtain to be moved.

19. The window covering assembly according to claim 1, further
comprising: a second cover track; a plurality of second hanger clips,
wherein the plurality of second hanger clips are attached to the second
curtain between the first end of the second curtain and the second end of
the second curtain, wherein the plurality of second hanger clips are
slidably interconnected with the second cover track such that the second
cover track supports a portion of the second curtain, wherein when the
drive element moves the drive attachment element so as to move the second
end of the second curtain each of the second hanger clips of the
plurality of second hanger clips slide with respect to the second cover
track to allow the second curtain to be moved.

20. The window covering assembly according to claim 18, further
comprising: a second cover track; a plurality of second hanger clips,
wherein the plurality of second hanger clips are attached to the second
curtain between the first end of the second curtain and the second end of
the second curtain, wherein the plurality of second hanger clips are
slidably interconnected with the second cover track such that the second
cover track supports a portion of the second curtain, wherein when the
drive element moves the drive attachment element so as to move the second
end of the second curtain each of the second hanger clips of the
plurality of second hanger clips slide with respect to the second cover
track to allow the second curtain to be moved.

21. The window covering assembly according to claim 1, wherein rotating
the drive element clockwise move the drive attachment element in a first
axial direction along the drive element, wherein rotating the drive
element counter-clockwise moves the drive attachment element in a second
axial direction along the drive element, wherein the second axial
direction is opposite to the first axial direction.

22. The window covering assembly according to claim 6, further
comprising: a second drive attachment element having a corresponding
second drive structure that communicates one or more of the at least one
guide structure to move the second drive attachment element axially along
the drive element when the drive element is rotated about the
longitudinal axis of the drive element, wherein when the second drive
element is rotated about the longitudinal axis of the drive element the
second drive attachment element moves in a second axial direction that is
opposite to the axial direction the drive attachment element moves, a
first additional curtain having a first additional end of the first
additional curtain and a second additional end of the first additional
curtain, wherein the first additional curtain is connected to a first
additional driver, wherein the first additional driver is coupled to the
second drive attachment such that when the second drive attachment
element is moved axially along the drive element by rotating the drive
element, the first additional driver is moved by the second drive
attachment; a second additional curtain having a first additional end of
the second additional curtain and a second additional end of the second
additional curtain, wherein the second additional end of the second
additional curtain is attached to a second additional driver, wherein the
second additional driver is removably coupled to the second drive
attachment element such that, when the second additional driver is
coupled to the second drive attachment element, the second additional
driver is moved by the second drive attachment element when the second
drive attachment element is moved axially along the drive element by
rotating the drive element, and when the second additional driver is
decoupled from the second drive attachment element, the second additional
driver is not moved by the second drive attachment element when the
second drive attachment element is moved axially along the drive element
by rotating the drive element; wherein movement of the second drive
attachment element from a first additional position on the drive element
to a second additional position on the drive element moves the first
additional driver from the first additional position on the drive element
to the second additional position on the drive element, wherein movement
of the second drive attachment element from the first additional position
on the drive element to the second additional position on the drive
element, when the second additional driver is coupled to the second drive
attachment element, moves the second additional driver from the first
additional position on the drive element to the second additional
position on the drive element, wherein movement of the second drive
attachment element from the second additional position on the drive
element to the first additional position on the drive element moves the
first additional driver from the second additional position on the drive
element to the first additional position on the drive element, wherein
movement of the second drive attachment element from the second
additional position on the drive element to the first additional position
on the drive element, when the second additional driver is decoupled from
the second drive attachment element, does not move the second additional
driver, wherein moving the second drive attachment element from the first
additional position on the drive element to the second additional
position on the drive element and/or moving the second drive attachment
element from the second additional position on the drive element to the
first additional position on the drive element, and coupling, or
decoupling, the second additional driver to, or from, the second drive
attachment element, allows the second additional end of the first
additional curtain and/or the second additional end of the second
additional curtain to be moved from the first additional position on the
drive element to the second additional position on the drive element
and/or the second additional end of the first additional curtain and/or
the second additional end of the second additional curtain to be moved
from the second additional position on the drive element to the first
additional position on the drive element, such that each of three
additional states can be achieved, wherein the first additional state is
the second additional end of the first additional curtain and the second
additional end of the second additional curtain are positioned at the
second additional position on the drive element, a second additional
state is the second additional end of the first additional curtain is
positioned at the first additional position on the drive element and the
second additional end of the second additional curtain is positioned at
the second additional position on the drive element, and the third
additional state is the second additional end of the first additional
curtain and the second additional end of the second additional curtain
are positioned at the first additional position on the drive element.

23. The window covering assembly according to claim 21, wherein the
assembly is a center closing assembly, wherein the first curtain and
second curtain are on a left side, wherein the first additional curtain
and second additional curtain are on a right side.

24. The window covering assembly according to claim 1, wherein the first
curtain is connected to the first driver via a first driver hanger clip.

25. The window covering assembly according to claim 1, wherein the second
curtain is connected to the second driver via a second driver hanger
clip.

26. The window covering assembly according to claim 1, wherein the drive
attachment element has a first magnet, where the second driver has a
second magnet, wherein coupling the second driver to the drive attachment
element is accomplished by bringing the second driver into proximity to
the drive attachment element while a speed of the second driver relative
to the drive attachment element is below a critical speed such that an
attraction of the first magnet to the second magnet can effect such
coupling.

27. The window covering assembly according to claim 24, wherein
decoupling the second driver from the drive attachment element is
accomplished by the drive attachment element pushing the second driver
into an object such that a force is created on the second driver to move
away from the drive attachment element such that the second driver is
decoupled from the drive attachment element.

Description:

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims the benefit of U.S. Patent
Application Ser. No. 61/702,093, filed Sep. 17, 2012, which is hereby
incorporated by reference herein in its entirety, including any figures,
tables, or drawings.

FIELD OF THE INVENTION

[0002] Embodiments of the present invention relate generally to a window
covering assembly used to cover windows. Specific embodiments of the
invention relate to a window covering assembly with a rotatable drive
element that has a structure formed into or on the outer surface of the
rotatable drive element such that a window covering moves axially along
the rotatable drive element when the rotatable drive element rotates.
Further specific embodiments relate to a window covering assembly in
which two different curtains are operated by the same rotating drive
element such that the user is able to independently move each curtain.
Further specific embodiments relate to a system with linked horizontal
drapery panels having various characteristics that are moved
independently by a common drive system.

BACKGROUND OF THE INVENTION

[0003] Window coverings, such as curtains, are frequently used to provide
privacy and to limit the amount of light that is permitted to pass
through a window and into a room.

[0004] There are numerous types of window coverings known in the art.
Curtains can be composed of panel(s) of fabric. For example, a curtain
may be a single panel curtain that opens and closes from left to right.
There is also a center closing curtain that is composed of two fabric
panels that meet in the center of the window to close and cover the
window.

[0005] Many different types of fabrics may be used depending on the user's
needs and preferences. For example, sometimes it is necessary not only to
cover but to also fully blackout the window such that no light passes
through. In this instance, a blackout curtain composed of opaque fabric
that completely darkens the window may be useful. There may also be other
situations, however, where some light is desired and some visibility is
desired. A sheer curtain composed of a translucent fabric may be useful
in this instance.

[0006] The curtain panels are attached to and suspended from a transverse
curtain rod that is hung above the window. The panels are usually joined
to the curtain rod by hooks or rings. The curtains are able to be moved
manually across the curtain rod(s) as desired by a pull rod or the like
to either cover or uncover the window.

[0007] There are various mechanisms, both electrical and manual, to
mechanically move a curtain back and forth across an opening. Typical
designs use a curtain guide track where the curtains are suspended. Some
curtain assemblies use a series of pulleys, cables, and belts to move the
curtain. In some cases these mechanisms are motorized. In these cases,
the number of components used adds complexity to the assembly and also
increases the cost of the assembly.

[0008] A sheer curtain is often hung with a blackout curtain on the same
window to accommodate different preferences for light and visibility at
different times. For example, a blackout curtain may be used to block out
unwanted early morning sun. The blackout curtain may then be opened to
allow the sun to filter through the sheer curtain later in the day. When
a blackout curtain is hung with a sheer curtain, utility bills may also
be lowered by using the different curtains to keep a home cool or warm,
depending on the weather.

[0009] Hanging two different curtains, however, requires the installation
of two different curtain guide tracks, one guide track for each curtain.
If two curtains are hung from the same curtain guide track, there is not
the ability to move one curtain without moving the other curtain and it
prevents both curtains from being in the deployed position
simultaneously.

[0010] U.S. Pat. No. 4,131,831 (Bochenek et al.) teaches a drapery opening
and closing system for draw draperies which are movable over a traverse
member between an open and closed position by use of a drapery drive
system. The opening and closing system has limit switches positioned to
be activated when the draperies are opened and closed. A manually
settable timer connected to a power source applies power at preset times
to a reversible motor via a control circuit. The control circuit is
comprised of a relay activated by the timer and a series connected
two-section switch. Outputs of the two-section switch are connected to
the reversible motor through the limit switches. When the timer is
triggered at a preset time, the draperies automatically open or closes.
Via the two-section switch, the draperies may be manually activated to
open or close at times other than the preset times on the timer.

[0011] U.S. Pat. No. 4,492,262 (Comeau) teaches a telescoping drapery
traverse rod with a motor drive without sacrificing any of the simple
consumer installation and adjustment features of conventional draw-cord
operated traverse rods. It employs a positive-drive perforated-plastic
tape and sprocket combination with the tape being releasably secured to
the master carriers in a manner analogous to that of the conventional
draw cord arrangement.

[0012] U.S. Pat. No. 4,773,464 (Kobayashi) teaches an actuator for
actuating a vertical blind or curtain of electric type to be mounted on a
mounting support face. The actuator is enabled to eliminate the
deformations such as torsions of rotating rods thereto to ensure their
rotations by driving the two ends of each of the rotating rods with the
torques of a pair of motors. The tension to be applied to a traverse rod
can be easily adjusted to an appropriate value by fastening a nut on a
tensing threaded rod connected to the traverse rod to tense the traverse
rod. Rotation transmitting unit can be held in position in a pivotal
state even if the tension is applied to the traverse rod. Since the
traverse rod is fitted in a bearing by the face contact between ridges
and corners, moreover, the rotating torque is dispersed to enhance the
breaking stress at the fitted connection.

[0013] U.S. Pat. No. 4,827,199 (Kaucic et al.) teaches a traverse rod
having a reversible torque responsive motor-drive assembly for operating
the traverse rod. The motor-drive assembly includes a stationary casing
fixed to the rod and a movable casing mounted in the stationary casing
for angular movement relative thereto about a turn axis. A reversible DC
motor in the movable casing is connected through a planetary gear speed
reducer to a traverse cord drive wheel for applying driving torque
thereto. The movable casing is arranged to turn about the turn axis in
opposition to the torque applied to the drive wheel and is yieldable
urged angularly about the turn axis toward a preselected neutral position
relative to the stationary casing. The motor-drive assembly has a torque
responsive motor control including stationary brush contacts fixed on the
stationary casing and adapted for connection to a power supply and
movable electrically conductive segments fixed on the movable casing and
electrically connected to the motor. The movable electrically conductive
segments include primary segments arranged to engage the brush contacts
when the movable casing is in the neutral position and auxiliary segments
spaced angularly about the turn axis from the primary segment to engage
the brush contacts when the movable casing is turned through a
preselected angle in either direction from the neutral position.

[0014] U.S. Pat. No. 4,878,528 (Kobayashi) teaches an electric blind of
the type, in which a traverse rod drive motor, a tilt rod drive motor and
their drive transmitting means are arranged at one end side of a casing
frame so that the casing frame can be easily cut at the other end side
without removing those motors and the drive transmitting means to leave a
new casing from of a desired length. The traverse rod and the tilt rod
can be cut together with the casing frame to improve the workability of
the electric blind. This blind has its slats offset from the center line
of the casing frame so that a shield cover can be extended to below the
casing frame to prevent the light from breaking therethrough. In this
blind, moreover, the positions of the clamping portions of brackets for
supporting the two sides of the casing frame can be adjusted
independently of one another so that the blind can be mounted on the wall
or the like without any difficulty.

[0015] U.S. Pat. No. 5,301,733 (Toti) teaches a cover system suitable for
windows including a tape support for maintaining the orientation of the
cover and for opening and closing the cover.

[0016] U.S. Pat. No. 5,467,808 (Bell) teaches an automatic blind or
curtain suspension system comprising a blind headrail 10 or curtain pole
carrying at least one suspension device 28 arranged for movement relative
to the headrail 10 or pole towards and away from a stop 48 to open and
close the blind or curtain. An electric motor 44a is coupled to the
suspension device 28 and operable to cause it to move relative to the
headrail 10 or pole. The system includes compression springs 50 adapted
to take up additional drive from the motor once motion of the suspension
device 28 is retarded by the stop 48. An automatic controller 12 is
provided which detects a monotonic increase in current to the motor 44a
associated with drive from the motor 44a being taken up by the springs 50
and interrupts current to the electric motor 44a when the increase in
motor current is detected. The controller may also keep track of the
position of the suspension device 28 and store its position when the
increase in current is detected. Drive to the electric motor 44a during
subsequent operation of the system may then be regulated in dependence
upon the stored value to interrupt current to the motor before the
suspension device 28 hits the stop 48 again.

[0017] U.S. Pat. No. 6,152,205 (Toti) teaches window cover systems
including window cover material in the form of pleated panels or slats.
The window cover material is suspended from a traverse track and is
traversed along the track for opening and closing the window system.
Arrangements for maintaining spacing and alignment of pleats or slats are
provided. The alignment maintaining arrangements include traverse tapes
which are substantially rigid in longitudinal and lateral directions in
the plane of the tape, and are flexible in a direction perpendicular to
the tape. The arrangements also include attaching the window cover
material to vertical edge members and providing foldable spacer-members
between adjacent edge-members. In one arrangement, a box-pleated panel of
window cover fabric is suspended from a traverse track on slide-members.
The slide-members are each attached to a spacer-tape at regular intervals
along the spacer-tape. The spacer-tape is substantially rigid in the
traverse direction and in a vertical direction perpendicular to the
traverse direction. The window cover system is opened and closed by
rolling and unrolling the panel and the spacer-tape around a roller
located at one end of a window frame. Other arrangements include
combined, tape-supported vertical slat blinds and vertical pleated
draperies in which the tape(s) are supported by sprockets or
wheels/pulleys.

[0018] U.S. Pat. No. 6,533,017 (Toti) teaches window cover systems
including window cover material in the form of pleated panels or slats.
The window cover material is suspended from a traverse track and is
traversed along the track for opening and closing the window system.
Arrangements for maintaining spacing and alignment of pleats or slats are
provided. The alignment maintaining arrangements include traverse tapes
which are substantially rigid in longitudinal and lateral directions in
the plane of the tape, and are flexible in a direction perpendicular to
the tape. The arrangements also include attaching the window cover
material to vertical edge members and providing foldable spacer-members
between adjacent edge-members. In one arrangement, a box-pleated panel of
window cover fabric is suspended from a traverse track on slide-members.
The slide-members are each attached to a spacer-tape at regular intervals
along the spacer-tape. The spacer-tape is substantially rigid in the
traverse direction and in a vertical direction perpendicular to the
traverse direction. The window cover system is opened and closed by
rolling and unrolling the panel and the spacer-tape around a roller
located at one end of a window frame. Other arrangements include
combined, tape-supported vertical slat blinds and vertical pleated
draperies in which the tape(s) are supported by sprockets or
wheels/pulleys.

[0019] U.S. Pat. No. 7,222,655 (Toti) teaches window cover systems include
window cover material in the form of pleated panels or slats. The window
cover material is suspended from a traverse track and is traversed along
the track for opening and closing the window system. Arrangements for
maintaining spacing and alignment of pleats or slats are provided. The
alignment maintaining arrangements include traverse tapes which are
substantially rigid in longitudinal and lateral directions in the plane
of the tape, and are flexible in a direction perpendicular to the tape.
The arrangements also include attaching the window cover material to
vertical edge members and providing foldable spacer-members between
adjacent edge-members. In one arrangement, a box-pleated panel of window
cover fabric is suspended from a traverse track on slide-members. The
slide-members are each attached to a spacer-tape at regular intervals
along the spacer-tape. The spacer-tape is substantially rigid in the
traverse direction and in a vertical direction perpendicular to the
traverse direction. The window cover system is opened and closed by
rolling and unrolling the panel and the spacer-tape around a roller
located at one end of a window frame. Other arrangements include
combined, tape-supported vertical slat blinds and vertical pleated
draperies in which the tape(s) are supported by sprockets or
wheels/pulleys. Therefore, it would be advantageous to have a simple
curtain assembly that will move a curtain from the deployed position to
the stored position with the minimum number of components that can be
motorized as well as manually operated. It would further be advantageous
to have a dual curtain assembly that will move two separate curtains.

SUMMARY OF THE INVENTION

[0020] Embodiments of the present invention relate to a window covering
assembly. For convenience, various embodiments will be described with
respect to curtains with the understanding that the description applies
to other window coverings as well. Embodiments of the curtain assembly
include a drive element wherein at least one guide structure is formed on
or into the outer surface of the drive element; a drive attachment
element having a corresponding structure that communicates with the at
least one guide structure to move the drive attachment element axially
along the drive element when the drive element is rotated; and a rotation
assembly for rotating the drive element. In some embodiments of the
invention, the guide structure forms a helical pattern on the rotatable
drive element and the corresponding structure is a tooth that is moved by
the groove when the drive element is rotated. The guide structure can
also be a ridge or other structure that can cause the corresponding
structure to move axially along the drive element when the drive rotates.

[0021] In specific embodiments the drive element can be a tube.

[0022] In specific embodiments according to the present invention, the
curtain assembly includes a rotatable drive element having a clockwise
helical guide structure and a counter clockwise helical guide structure
formed on, or into, the outer surface of the drive element; a first drive
attachment element having a structure that communicates with the
clockwise helical guide structure to move the drive attachment element
axially along the drive element when the drive element is rotated; and a
second drive attachment element having a structure that communicates with
the counterclockwise helical guide structure to move the drive attachment
element axially along the drive element when the drive element is
rotated; and a rotation assembly for rotating the drive element.

[0023] In accordance with some embodiments of the present invention, a
dual curtain assembly is provided. A specific embodiment of dual curtain
assembly includes a rotatable drive element having at least one guide
structure formed on, or into, the outer surface of the drive element; at
least two drive attachment elements having a corresponding at least two
structures that communicate with the at least one guide structure to move
the at least two drive attachment elements axially along the drive
element when the drive tube is rotated Further specific embodiments can
also incorporate a rotation assembly for rotating the drive element. The
rotation assembly can be manual or motorized.

[0024] In accordance with some embodiments of the invention, a dual
curtain assembly includes a drive element having at least one guide
structure formed on, or into, the outer surface of the drive element; at
least one outer drive attachment element having a corresponding at least
one outer structure that communicates with the at least one guide
structure to move the at least one drive attachment element axially along
the drive element when the drive element is rotated; at least one inner
drive attachment element having a corresponding at least one feature that
communicates with the at least one guide structure to move the at least
one inner drive attachment element axially along the drive element when
the drive element is rotated; and a rotation assembly for rotating the
drive element.

[0025] In accordance with yet other embodiments of the invention,
applicable, for example, to a center closing curtain system, the curtain
assembly may include a drive element having at least one guide structure
formed on, or into, the outer surface of the drive element; a left outer
drive attachment element having a corresponding left outer structure that
communicates with the at least one guide structure to move the left outer
drive attachment element axially along the drive element when the drive
element rotates; a right outer drive attachment element having a right
outer structure that communicates with the at least one guide structure
to move the right outer drive attachment element axially along the drive
element when the drive element rotates; a left inner drive attachment
element having a corresponding left inner structure that communicates
with the at least one guide structure to move the left inner drive
attachment element axially along the drive element when the drive element
is rotated; a right inner drive attachment element having a corresponding
right inner structure that communicates with the at least one guide
structure to move the right inner drive attachment element axially along
the drive element when the drive element is rotated; and a rotation
assembly for rotating the drive element, wherein the rotation of the
drive element moves the left and right outer drive attachment elements
axially along the drive element when the drive element is rotated and
independently moves the left and right inner drive attachment elements
along the drive element when the drive element is rotated.

[0026] These features and aspects of the invention as well as its
advantages are understood by referring to the following description,
appended claims, and accompanying drawings, in which:

[0027] FIG. 1 is a perspective view of one embodiment of the curtain
assembly showing a curtain in the deployed position and the window is
covered.

[0028]FIG. 2 is a perspective view of one embodiment of the curtain
assembly showing the curtain in the stored position and the window is not
covered.

[0029] FIG. 3 is a perspective view of one embodiment of the curtain
assembly showing a left hand curtain in the stored position.

[0030]FIG. 4 is an enlarged perspective view of one embodiment of the
curtain assembly showing a center closing curtain in the deployed
position covering the window.

[0031]FIG. 5 is an enlarged perspective view of the components of the
rotatable drive element according to one embodiment of the curtain
assembly in which the rotation of the drive element is powered by a
battery operated motor.

[0032]FIG. 6 is an enlarged perspective view of the components of the
rotatable drive element according to one embodiment of the curtain
assembly in which the power supply to the motor is external to the drive
element.

[0033]FIG. 7 is an enlarged perspective view of one embodiment of the
curtain assembly showing the rotatable drive element with a clockwise
helical groove.

[0034]FIG. 8 is an enlarged perspective view of one embodiment of the
curtain assembly showing the rotatable drive element with a counter
clockwise helical groove.

[0035]FIG. 9 is an enlarged perspective view of one embodiment of the
curtain assembly showing the rotatable drive element with a clockwise
helical groove and a counter clockwise helical groove.

[0036] FIG. 10 is an enlarged perspective view of the drive attachment
element according to one embodiment.

[0037]FIG. 11 is an enlarged side view of the drive attachment element 36
showing the structure 62 as a tooth according to one embodiment.

[0038] FIG. 12 is an enlarged cross-sectional view of the drive attachment
element 36 showing the angle of the drive tooth 62 according to one
embodiment.

[0039]FIG. 13 is an enlarged perspective view of the drive attachment
element having a first drive tooth and a second drive tooth according to
one embodiment.

[0040]FIG. 14 is an enlarged side view of the drive attachment element 36
having a first drive tooth and a second drive tooth according to one
embodiment.

[0041] FIG. 15 is an enlarged cross-sectional view of the drive attachment
element 36 showing the angle of the second drive tooth 90 according to
one embodiment.

[0042]FIG. 16 is an enlarged cross-sectional view of the drive attachment
element 36 showing the angle of the first drive tooth 88 according to one
embodiment.

[0043] FIG. 17 is a section view of the tube 26 and the drive attachment
element 36 showing the engagement of the first drive tooth 88 in the
first helical groove 38.

[0044]FIG. 18 is an enlarged end view of a motor drive adapter according
to one embodiment of the curtain assembly.

[0045]FIG. 19 is an enlarged perspective view of a motor drive adapter
according to one embodiment of the curtain assembly.

[0046]FIG. 20 is an enlarged perspective view of the rotatable drive
element according to one embodiment.

[0047]FIG. 21 is an enlarged end view of the rotatable drive element
according to one embodiment.

[0048]FIG. 22 is an enlarged perspective view of the preferred tube
embodiment with the position a section was taken to reflect the two
clockwise helical grooves 38 and two counter clockwise grooves 40 in the
tube 26.

[0049]FIG. 23 is an end view of the drive element assembly of the
preferred embodiment showing the starting points of the clockwise helical
grooves 38 and the counter clockwise grooves 40.

[0052]FIG. 26 is a drawing of the functional relationship of the helical
grooves 38 and 40 to the midpoint of the drive element to assure the
drive attachment elements meet in the midpoint of the drive element on
center close draperies.

[0053]FIG. 27 is a perspective view of one embodiment of the curtain
assembly when the outer curtain is a blackout curtain in the deployed
position and the inner curtain is a sheer curtain in the deployed
position.

[0054]FIG. 28 is a perspective view of one embodiment of the curtain
assembly when the outer curtain is a blackout curtain in the stored
position and the inner curtain is a sheer curtain in the deployed
position.

[0055]FIG. 29 is a perspective view of the embodiment of the curtain
assembly when both the outer and inner curtains are in the stored
position.

[0056]FIG. 30 is a perspective view of the preferred embodiment with the
outer curtain is a blackout curtain with a portion cut away to show the
position of the external battery pack from FIG. 6.

[0057]FIG. 31 is an enlarged perspective view of the components of the
rotatable drive element according to one embodiment of the curtain
assembly showing an internal battery power supply.

[0058]FIG. 32 is an enlarged perspective view of the components of the
rotatable drive element according to one embodiment of the curtain
assembly show an external power supply.

[0059]FIG. 33 is a cross-sectional view of the drive section of the
rotatable drive element showing the helical groove and a non-driving
groove according to one embodiment of the curtain assembly.

[0060]FIG. 34 is an enlarged perspective view of one embodiment of the
curtain assembly non-driving groove.

[0061] FIG. 35 is an enlarged perspective view of one distal end of the
rotatable drive element showing the inner drive attachment element and
the inner driver stall area according to the same embodiment of the
curtain assembly shown in FIG. 34.

[0062]FIG. 36 is an enlarged side view of the inner drive attachment
element according to one embodiment of the curtain assembly.

[0063]FIG. 37 is an enlarged perspective view of the inner drive
attachment element according to one embodiment of the curtain assembly.

[0064]FIG. 38 is an enlarged sectioned view of the inner drive attachment
element according to one embodiment of the curtain assembly.

[0065]FIG. 39 is an enlarged side view of the inner drive attachment
element according to one embodiment of the curtain assembly.

[0066] FIG. 40 is an enlarged perspective view of the inner drive
attachment element according to one embodiment of the curtain assembly.

[0067]FIG. 41 is an enlarged sectioned view of the inner drive attachment
element according to one embodiment of the curtain assembly

[0068]FIG. 42 is an enlarged perspective view of an outer idler
attachment element according to one embodiment of the curtain assembly.

[0069] FIG. 43 is an enlarged sectioned view of an outer idler attachment
element according to one embodiment of the curtain assembly.

[0070]FIG. 44 is an enlarged side view of an outer idler attachment
element according to one embodiment of the curtain assembly.

[0071] FIG. 45 is an enlarged side view of an outer drive attachment
element according to one embodiment of the curtain assembly

[0072]FIG. 46 is an enlarged sectioned view of an outer drive attachment
element according to one embodiment of the curtain assembly.

[0073]FIG. 47 is an enlarged perspective view of an outer drive
attachment element according to one embodiment of the curtain assembly.

[0074]FIG. 48 is an end view of the curtain assembly showing the guide
track, guides, attachment elements, and the position of the inter-curtain
engager.

[0075]FIG. 49 is a is a perspective view of a curtain assembly according
to one embodiment when the outer curtains are center closing blackout
curtains in the stored position and the inner curtains are center closing
sheer curtains in the deployed position

[0076] FIG. 50 is a perspective view of a curtain assembly according to
one embodiment when the outer curtains are center closing blackout
curtains in the deployed position and the inner curtains are center
closing sheer curtains in the stored position.

[0077]FIG. 51 is a perspective view of the tube end with the inner driver
stall area.

[0078] FIG. 52 is a top view of the curtain assembly with the guide track
removed to see the position of the guides and attachment elements with
the inner and outer curtains deployed and the outer drive attachment
element can stop the tube from rotation when it stalls against the inner
attachment element in the stall area.

[0079] FIG. 53 is a top view of the curtain assembly with the guide track
removed to see the position of the guides and attachment elements with
the inner curtains deployed and the inter-curtain engager is in the
engage-outer-drive-attachment-element position and the inner drive
attachment element is in the stall area.

[0080] FIG. 54 is a top view of the curtain assembly with the guide track
removed to see the position of the guides and attachment elements with
the inner and outer curtains in the stored position and the outer simple
attachment elements and the outer drive attachment element are in the
non-driving or stall area. The inner curtain drive attachment element can
stop the tube from rotation when it contacts the outer curtain drive
attachment element.

[0081]FIG. 55 is a perspective view of the area where the outer
attachments are stored with the tube, inner and outer curtains removed to
show the position of the inter-curtain engager and the carrier tracks.

[0082] FIG. 56 is a perspective view of the inner curtain carrier and
S-hook.

[0083] FIG. 57 is a perspective view of the inner curtain carrier with the
inner curtain engager.

[0084] FIG. 58 is three views of the preferred tube embodiment with an
outer driver stall area and two helical grooves spaced 180 degrees apart.

[0085] FIG. 59 is another tube embodiment with four helical grooves, two
are counter clockwise spaced 180 degrees apart and two are clockwise
spaced 180 degrees apart.

[0086]FIG. 60 is another embodiment of a tri-lobed tube, drive element,
and internal tube driver.

[0087]FIG. 61 shows four views of the inner curtain carrier and S-hook.

[0093]FIG. 67 shows an end view of the assembly of FIG. 64 with the end
plate 112 removed.

[0094]FIG. 68 shows a bottom-up perspective view of the assembly of FIG.
64.

[0095] FIG. 69 shows a section view of the center mounting of the drive
elements 114 and 115.

[0096]FIG. 70 shows a top view of the inner curtain driver 123 with a
portion of the cover track 111 cut away showing the swivel magnet 124 and
stationary magnet 135 having the same poles proximate to and repelling
each other and the outer driver 121 physically separation the magnets 124
and 135.

[0097] FIG. 71 shows a top view of the inner curtain driver 123 with a
portion of the cover track 111 cut away showing the inner driver 123
disengaged from the outer driver element 121 allowing the drapery to be
moved by hand.

[0098]FIG. 72 shows a top view of the inner curtain driver 123 with a
portion of the cover track 111 cut away showing the swivel magnet 124 and
stationary magnet 135 having opposite poles proximate to and attracting
each other.

[0099]FIG. 73 shows a top view of the inner curtain driver 123 with a
portion of the cover track 111 cut away showing the magnets 124 and 135
no longer attached and the outer driver 121 engaged with the inner
curtain driver 123.

[0100]FIG. 74 shows a top view of the inner curtain driver 123 with a
larger portion of the cover track 111 cut away showing the swivel magnet
124 and stationary magnet 135 having opposite poles proximate to and
attracting each other, the outer driver 121 engaged with the drapery
driven hanger 117 and the inner curtain driver hanger 116.

[0101]FIG. 75 shows a section view taken from the area where the outer
driver 121 is engaged with the drive element 114.

[0102]FIG. 76 shows an exploded parts view of the assembly of FIG. 64.

[0104] Referring to FIG. 1, a curtain assembly 20 according to one
embodiment of the invention is shown. The curtain assembly 20 comprises a
rotatable drive element 22 wherein a helical guide structure 24 is formed
into the outer surface 26 of the drive element 22, a drive attachment
element 36 having a corresponding structure 62 that communicates with the
helical guide structure 24 to move the drive attachment element 36
axially along the drive element 22 when the drive element 22 is rotated
and a rotation assembly 32 (not shown) for rotating the drive element 22.
In some embodiments of the invention, the helical guide structure 24 is a
helical groove 24 and the corresponding structure 62 is a tooth. While
the helical guide structure 24 is shown in FIGS. 1-3 as a helical groove,
the helical guide structure 24 is not limited to a groove. Similarly, the
corresponding structure 36 discussed in the embodiments below is a tooth
62 but is not limited to being a tooth. In some embodiments, one or more
curtain supports 67 supported by the rotatable drive element 22 can also
be utilized to support the curtain. The drive attachment element 36, as
shown in FIGS. 1-3 will be explained further below.

Description of Curtains

[0105] As shown in FIG. 1, the curtain 44 used is composed of a single
continuous panel of fabric that moves back and forth across the drive
element 22 to the deployed position (covering the window) and to the
stored position (not covering the window 34). The curtain 44 may extend
to the right to the deployed position (covering the window 34) and then
gather to the left to the stored position, uncovering the window 34. This
is shown in FIGS. 1 and 2. For example, FIG. 1 shows that a curtain 44
extended to the right (deployed position) to cover the window 34 and FIG.
2 shows the curtain 44 gathered to the left (stored position) to uncover
the window 34. In other embodiments, the curtain 44 may extend to the
left to the deployed position (covering the window 34) and then gather to
the right to the stored position (uncovering the window 34). For example,
FIG. 3 shows a curtain assembly 20 wherein the curtain 44 is gathered to
the right (stored position) to uncover the window 34. Although not shown,
the curtain 44 in FIG. 3 would extend to the left to the deployed
position to cover the window 34.

[0106] Again, although curtain is used to describe a preferred embodiment
of the invention, other embodiments utilize other window coverings, such
as verticals and draperies.

[0107] In some embodiments, the curtain 44 may be a center closing curtain
46. A center closing curtain 46 is composed of two fabric panels, a right
panel 50 and a left panel 48 that meet in the center 42 of the window 34
to close and cover the window 34. FIG. 4 shows a curtain assembly 20
where a center closing curtain 46 is used and is in the deployed
position. The window 34 is covered in this instance. For example, the
right panel 50 extends to the left to the center of the window 42. The
left panel 48 extends to the right to the center of the window 42.

Drive Element

[0108] The curtain assembly 20 includes a drive element 22. FIGS. 5 and 6
show one embodiment of the drive element 22 in detail. A curtain 44 can
be connected to the drive element 22 by one or more curtain supports 36
and 67 as explained below. Alternatively, at least a portion of the
curtain can be supported by another structure adjacent to the rotatable
drive element 22, such as a support guide (not shown).

[0109] The rotatable drive element 22 is designed to be installed above a
window 34, or near the top of the window 34, similar to a traditional
curtain rod. For example, as shown in FIG. 1, drive element 22 is mounted
on axles 52 that are located and secured in the end brackets 54. The end
brackets 54 are adapted for connection with, for example, a window frame,
sash, or wall. The end brackets 54 may also include a rubber mounting
disk 13, not shown, that is compressed, and, optionally, inserted into a
finial 95 or other structure to create friction, when the drive element
22 is installed, to hold the drive element 22 firmly in place and
minimize noise.

[0110] The drive element 22 may vary in size. For example, the drive
element 22 may be the width of the window 34, narrower than the window
34, or wider than the window 34. The outer diameter 56 of the drive
element 22 may similarly vary. In specific embodiments, the drive element
has an outer diameter of the drive element that is 1 inch, 11/4 inches,
11/2 inches, 2 inches, 1-2 inches, 1-11/2 inches, 11/2-2 inches, less
than 1 inch, and/or greater than 2 inches. In some embodiments, the drive
element 22 has a hollow portion that is sized to mount a motor 82 inside
the hollow portion of the drive element 22 rather than mounting the motor
82 outside the drive element 22. Using the inside of the drive element 22
to conceal the motor 82 may give a more aesthetically pleasing design for
a curtain assembly 20. Any number of materials, such as aluminum, other
metals or alloys, plastics, wood, and ceramics, may be used to fabricate
the drive element 22 provided the drive element 22 can support the weight
of the curtain 44.

[0111] Although the FIGS. 5 and 6 show the outer surface of the drive
element 22 as cylindrical in shape, the cross-sectional shape of the
drive element 22 is not limited and may be non-circular. In an
alternative embodiment, as shown in FIGS. 20 and 21, the rotatable drive
element 22 may be tri-lobed.

Guide Structure

[0112] The drive element 22 has at least one guide structure 24 formed,
for example, on, or into, the outer surface 26 of the drive element 22.
For convenience, as a preferred embodiment employs a one or more helical
guide structure, it is understood that descriptions of embodiments of the
invention having helical guide structures also applies to embodiments
having guide structures with other patterns. A preferred guide structure
24 is a helical guide structure 24. Such a guide structure may be a
groove in some embodiments, as shown in FIGS. 7-9. The helical guide
structure 24, however, is not limited to being a helical groove. For
example, the guide structure 24 may be a ridge, protrusion, or other
structure that can communicate with the corresponding structure of the
drive attachment element to axially move the drive attachment element
along the drive element when the drive element is rotated.

[0113] The helical groove 24 can extend along a portion of, or the
entirety of, the drive element 22. In a preferred embodiment, the helical
groove extends from one distal end portion, referred to as the motor end
58, to the opposing distal end portion, referred to as the bearings end
59, of the drive element 22. Alternatively, the helical guide structure
24 can begin and end at any desired point along the longitudinal axis of
the drive element 22, and/or stop and start over various portions of the
drive element, depending on the application. The length of the helical
groove 24 is a factor in determining how far a curtain 44 will travel
across the drive element, i.e., the entire length of the drive element 22
as opposed to some shorter section of the drive element 22. The angle of
the helical groove determines how far the drive attachment element will
move along the drive element for a given amount of rotation of the drive
element.

[0114] In an embodiment, the helical groove 24 is formed in either a
clockwise direction or a counterclockwise direction. FIG. 7 illustrates a
drive element 22 having a counterclockwise helical groove 38. FIG. 8
illustrates a drive element 22 having a clockwise helical groove 40.

[0115] In one embodiment, the drive element 22 has two helical grooves 24,
one formed in the clockwise direction and one formed in the
counterclockwise direction. FIG. 9 illustrates a drive element 22 in
which there are a counter clockwise helical groove 38 and a clockwise
helical groove 40. In yet other embodiments, the drive element 22 may
have four helical grooves, two clockwise helical grooves 38 and two
counter clockwise helical grooves 40 as shown in FIGS. 22-24.

[0116] When two clockwise helical grooves 38 or two counter-clockwise
helical grooves 40 are utilized, the two clockwise helical grooves 38, or
the two counter-clockwise helical grooves 40 are preferably spaced
approximately 180 degrees apart. Other spacings can also be utilized. The
clockwise helical grooves 38 and the counterclockwise helical grooves 40
preferably form the same angle with the longitudinal axis. The profile of
the helical grooves 38, 40 can be self-centering to allow the drive tooth
62 to traverse the intersection of the clockwise helical groove 38 and
the counter clockwise helical groove 40 without binding. A beveled
groove, which allows such self-centering, is shown in FIG. 17.

[0117] The helical grooves 24 may be formed by forming grooves into the
outer surface 26 of the drive element 22 such that the grooves 24 are
recessed from the outer surface 26 of the drive element 22.
Alternatively, the helical guide structures 24 may be formed as one or
more protrusions that project or bulge from the outer surface 26 of the
drive element 22. The protrusions may be formed in a variety of manners,
for example, by winding material around the outer surface 26 of the drive
element 22, forming, e.g., extruding the drive element in a manner that
creates indentations in and/or projections from the outer surface of the
drive element, or forming the drive element so as to have an outer
surface able to apply a force in the longitudinal direction to a
structure 62 of the corresponding drive attachment element 36 when the
corresponding structure is engaged with the structure 24 upon rotation of
the drive element about the longitudinal axis.

[0118] In an alternative embodiment, a sleeve, or outer tube 63, having
helical guide structure 24 and sized to fit around a portion of the drive
element 22 may be used. In this case, the drive sleeve has at least one
helical groove 24 in a clockwise or counter clockwise direction formed on
the outer surface of the sleeve. The sleeve/outer tube can be
interconnected to an inner tube 61, or other inner drive element 9 (e.g.,
rod), that is rotated so as to cause the rotation of the sleeve/outer
tube. The inner drive element 9 can provide sufficient stiffness to keep
the sleeve from bending too much along the longitudinal axis of the
sleeve from the weight of the curtains, so that the sleeve need not be
sufficiently stiff to keep from bending too much along the longitudinal
axis of the sleeve from the weight of the curtains. The drive element 22,
which then comprises the inner drive element 9 and the outer tube or
sleeve, again translates the torque from the rotation assembly to axially
movement of the curtain support 67 or drive attachment element 36 across
the drive element 22. In an embodiment, the drive sleeve is secured to
the inner drive element to form the drive element 22 such that the sleeve
does not slide up or down the inner drive element or rotate around the
inner drive element 9. It may also be desired to remove the sleeve from
the inner drive element 9 and replace it with another sleeve. Using a
drive sleeve has the advantage that the geometry of the helical groove 24
including its length may be easily changed by removing the sleeve and
replacing it without fabricating a new drive element 22.

[0119] The helical grooves 24 may also vary in angle and therefore, may
differ in the amount of time (rotations of the drive element) that it
takes to travel across the drive element 22. For example, a helical
groove 24 with a larger angle, with respect to a plane through a
cross-section of the drive element, may create a shorter path for the
structure to travel and lead to a faster moving curtain 44 for a certain
rotation speed of the drive element. In some embodiments, the angle of
the helical grooves 24, with respect to a cross-sectional plane of the
drive element, may vary along the drive element in the direction of the
longitudinal axis 60 of the drive element 22 such that the curtain 44 may
move at different speeds along the drive element 22, for a given
rotational speed of the drive element, if desired. The angle of the
helical groove 24, with respect to a cross-sectional plane of the drive
element, varies from greater than 0 degrees and less than 90 degrees,
preferably varies from 10 degrees to 80 degrees, more preferably varies
from 20 degrees to 70 degrees, even more preferably varies from 30
degrees to 60 degrees, and is most preferably 45 degrees.

Rotation Assembly

[0120] The drive element 22 can be connected to a rotation assembly 33 for
rotating the drive element 22, where the rotation of the drive element 22
moves the drive attachment element 36 along the drive element via the
helical groove 24 of the drive element 22.

[0121] The rotation assembly 33 may be a pull cord 72 connected to the
drive element 22 or a motor assembly 32. The drive element 22 may be
rotated manually. For example, a pull cord 72 as shown in FIGS. 1-3 may
be connected to the drive element 22 such that the drive element 22 can
be manipulated manually to rotate when it is desired to deploy or store
the curtain 44. The use of pull cords 72 is well known in the art.

[0122] A motor assembly 32 may be used to rotate the drive element 22. The
motor 82 may be mounted either inside or outside the drive element 22. In
one embodiment, the motor 82 is mounted inside the drive element 22 and
generally concealed from plain view. Components including axles 52 and
bearings 94 may also be located inside the rotatable drive element 22.

[0123] A slip ring 28 may be used to transfer current from the power
supply external to the drive element 22 to the motor 82 in the drive
element 22 as shown in FIG. 6. Alternatively, batteries 84 in a battery
tube 86 may be used as shown in FIG. 5 to power the motor 82. The
batteries 84 in the battery tube 86 may be in a spring loaded sleeve to
assist with loading and unloading the batteries 84 from the battery tube.
In some embodiments, a motor drive adapter 92 as shown in FIG. 6 may also
be used to securely attach or connect the motor 82 to the drive element
22. In other embodiments, the motor housing fits tightly against the
drive element 22 and turns the drive element 22 when the motor output
shaft is held in end bracket 54 to prevent it from turning. FIG. 5 shows
the interconnection of end caps 51, axles 52, bearings 94, bearing
housings 57 (note the bearing housing 57 is shown on the motor end in
FIG. 5, but the bearing housing 57 on the battery end is not shown),
motor 82, and battery tube 86. FIG. 6 shows a slip ring 28, which is
optional, and allows the circuit to be completed while rotating.

[0124] In a motorized operation, the user may push a button 98 on a remote
control 96 to turn on the motor 82 to rotate the drive element 22 such
that the curtain 44 moves across the drive element 22 between a stored
position and a deployed position depending on the user's preference. The
remote control 96 and button 98 are shown in FIGS. 1-3. In other
embodiments, the motor 82 may respond to a signal from the remote control
96 that is initiated by a voice command to the remote control, which then
causes the motor 82 to rotate the drive element 22.

[0125] The curtain assembly 20 may also include a remote control 96 having
a control board that generates a signal when the user makes a selection
on the remote control 96. The control board has a transmitter that can
wirelessly communicate with a receiver that is remotely located from the
transmitter. For example, the receiver may be located in the motor 82 in
the drive element 22. The receiver receives the transmitted signal from
the transmitter and transmits it to the motor 82, which will cause the
motor 16 to turn on, rotate the drive element 22, and moves the curtain
44.

[0126] As the drive element rotates, either manually or by a motor 82, the
curtain 44 is engaged on the drive element 22 and moves axially along the
drive element 22 to either a deployed or stored position.

Curtain Support, Drive Attachment Element and Structure

[0127] The curtain assembly 20 can include a drive attachment element 36
having a structure 62 that communicates with the guide structure 24 to
move the drive attachment element 36 axially along the drive element 22
when the drive element 22 is rotated. The curtain assembly can also
include one or more idler attachment elements 67 that interconnect with
the drive element to support the window covering, e.g. curtain. In
specific embodiments, the drive attachment element 36 has a corresponding
feature 62 that is a tooth 62 as described below.

[0128] The curtain assembly 20 of the present invention may include in
some embodiments at least one drive attachment element 36 having a
feature 62 that communicates with a helical guide structure 24 to move
the drive attachment element 36 axially along the drive element 22 when
the drive element 22 is rotated. The helical guide structure may be a
helical groove 24 and the feature 62 may be a tooth. Referring to FIG. 1,
one end, such as the motor end, of the curtain can be fixed 64 and the
adjacent opposing end, such as the bearings end, of the curtain 66 can be
attached to the drive attachment element 36. The feature 62 as a tooth is
shown in FIGS. 10-12. FIG. 10 shows an enlarged perspective view of the
drive attachment element 36. FIG. 11 is an enlarged side view of the
drive attachment element 36 showing the drive tooth 62 according to one
embodiment. FIG. 12 is an enlarged cross-sectional view of the drive
attachment element 36 showing the angle α (approximately 30
degrees) of the drive tooth 67. This angle α is the same angle as
the helical groove makes with respect to a cross-sectional plane of the
drive element.

[0129] As shown in FIGS. 10-12, the drive attachment element 36 can be
ring-shaped and slides over the drive element 22. A different
construction, however, may be used for the drive attachment element 36.
As an example, the drive attachment element may have one or more
additional structures 62, which may follow a corresponding one or more
additional grooves, and/or one or more of the structures 62 can be
located at a different rotational position with respect to the
longitudinal axis of the drive element when the structure is mounted onto
the drive element. The drive attachment element 36 is preferably provided
with a slot 99 into which a traditional curtain hook 37 can be used to
connect the end of the curtain to the drive attachment element 36.
Curtain pins and curtain rings that are well known in the art to hang
curtains may be used.

[0130] The structure 62 is designed to communicate with or engage the
helical groove 24 of the drive element to move the drive attachment
element 36 axially along the drive element, thereby moving the curtain.
In one embodiment, the feature is a tooth formed on an angle on the inner
surface of the body of the drive attachment element. The angle α of
the drive tooth 62 is specifically designed to engage the helical groove
on the drive element 22. In an embodiment, a design consideration is to
maximize the amount of contact between the rotating drive element 22 and
the drive attachment element 36 to move the weight of the curtain. The
location of the tooth 62 with respect to the drive attachment element 36,
in some embodiments of the present invention, are adjustable such that
the angle the location of the tooth makes with respect to the drive
element when the drive attachment element is interconnected to the drive
element is adjustable. This adjustability allows the user of the curtain
assembly to set the correct location of the drive attachment element(s)
36 in relationship to the axial position along the drive element for a
particular rotational position of the drive element, as where the tooth
is positioned and where the helical groove is located for a particular
angular position of the drive element determines the axial position of
the drive attachment element and, therefore, the axial position of the
point of the curtain attached to the drive attachment element. In this
way, if it is desired for a distal end of the curtain to reach the distal
end of the drive element at a particular degree of rotation of the drive
element (e.g., 720°, or 3600°), then the relative
rotational position of the tooth to the drive attachment element can be
adjusted.

[0131] In some embodiments, the drive attachment element 36 has a first
drive tooth 88 and a second drive tooth 90 as shown in FIGS. 13-16. Both
the first drive tooth 88 and the second drive tooth 90 are configured to
communicate with different helical grooves 24 of the drive element 22.
The first drive tooth 88 and the second drive tooth 90 are positioned
inside the drive attachment element 36 at the top and the bottom of the
drive attachment element 36, respectively. FIGS. 15 and 16 show
cross-sectional views of the top and the bottom of the drive attachment
element 36 which show the angle α1 of the first drive tooth
and the angle of the second drive tooth α2. The angles
α1, α2 are both 45 degrees. The angles
α1, α2 of the first drive tooth 88 and the second
drive tooth 90 are not limited to 45 degrees and are configured to
communicate with the corresponding helical groove 24 of the drive element
22. In a preferred embodiment, also shown in FIGS. 22-26, there are four
helical grooves 26. Two are clockwise spirals 38 and two are
counter-clockwise 40.

[0132] One issue with this type of helical pattern on center closing
curtains is keeping the timing of the drive attachment elements and the
helical groove such that the two curtains always meet in the center of
the opening when the drive element is drive (rotated to the close
position. This issue is further complicated by being able to cut down the
length of the tube to fit smaller windows. If a quad-helix drive element
(two clockwise and two counterclockwise helixes) is cut down to a length
that is not a multiple of 1/2 the pitch of the helixes, the drive
attachment elements of the right curtain and the left curtain (for a dual
curtain assembly) may not meet in the middle of the drive element. See
FIG. 26. The adjustable drive attachment element can allow the teeth to
be repositioned inside the drive attachment element such that the drive
attachment element can start from a different axial position along the
drive element and end at the desired axial position in the center, or
other desired axial position. This adjustment of the position of the
tooth with respect to the drive attachment element can correct the offset
caused by the odd length of the drive element, e.g., from cutting an end
off, and allows the right curtain drive attachment element and the left
attachment element to meet in the middle.

[0133] The gear teeth between the "Clicker" and "Gear Ring" parts of the
adjustable drive attachment element, in a specific embodiment, do not
allow the "Clicker" to rotate when it is on the tube. In this case,
removing the adjustable drive attachment element from the drive element
allows the user to adjust the "Clicker" manually by disengaging it from
the Gear Ring. The outward force of the drive element on the Clicker's
gear teeth essentially locks it into the Gear Ring. Specific embodiments
allow the tooth to be repositioned about one inch in either direction.
For a drive element where 1/2 the pitch length is two inches, rotating
the tube 180 degrees before installing the adjustable drive attachment
element changes the starting position by 1/2 pitch length, which will
correct the adjustable drive attachment element's starting position to an
acceptable degree.

Although the structure 62 described in the embodiments above is a tooth,
other embodiments for the structure 62 may be used as well.

Simple Attachment Elements

[0134] The curtain assembly 20 may further comprise a plurality of idle
attachment elements 67 connected to the drive element 22 for sliding
movement along the drive element 22. The remaining attachment points 68
of the curtain 34 that are not connected to the drive attachment element
36 can then be suspended from the drive element 22 using one or more
idler attachment elements 67.

[0135] Referring to FIG. 1, the curtain has one fixed end 64 and an
adjacent opposing end 66 that is connected to the drive attachment
element 36. The remaining ends (or attachment points) of the curtain 68
are positioned between the fixed end 64 and the adjacent opposing end 66
that is connected to the drive attachment element 36. These remaining
attachment points 68 may be suspended from the drive element 22 using a
plurality of idler attachment elements 67. The idler attachment elements
67 are interconnected to the rotatable drive element 22 as shown in FIGS.
1-4. Such interconnection of idler attachment elements 67 can be such
that the idler attachment element surrounds a portion of, or all of, the
circumference of the cross-section of the drive element and hangs freely
on the drive element. In other embodiments, the idler attachment elements
can be also interconnected with a structure external to the drive
element.

[0136] The idler attachment elements 67 may be shaped similar to the drive
attachment element 36. In some embodiments, the idler attachment elements
67 may have a smooth bore to allow free movement along the drive element
22 as the curtain moves. In other embodiments, the idler attachment
elements 67 may have a tooth to assist in the movement of the curtain
across the drive element. In embodiments having a tooth, the drive
element can have a region that frees the tooth when the simple attachment
element reaches a certain axial region of the drive element, such as an
end of the drive element, going one axial direction, and re-engages the
tooth as the idler attachment element is pulled in the other axial
direction out of the same axial direction.

[0137] As shown in FIGS. 1-4, the idler attachment elements 67 may be
rings that slide over the drive element 22. The idler attachment elements
67 may be provided with a slot or a hole (not shown) into which a
traditional curtain hook (or loop) 37 is used to attach the remaining
attachment points 68 of the curtain 44 to the idler attachment element 67
as shown in FIGS. 4-6. Curtain pins and curtain rings that are well known
in the art to hang curtains may be used.

Pull Rods and Programming

[0138] In some embodiments, the drive attachment element 36 has a single
tooth 62 and is a loose fit on the drive element 22. In these cases, the
curtain assembly 20 can include a draw rod 70 connected to the drive
attachment element 36 wherein the drive tooth 62 is disengaged from the
guide structure 24 of the drive element 22 by applying force on the draw
rod 70. The draw rod 70 may be an elongated rod or any other mechanism
that is configured to allow the user to manually disengage the drive
attachment element 36 from the guide structure 24. The draw rod can then
be used to axially move the drive attachment element along the drive
element.

[0139] The motor 82 for the curtain assembly 20 may be programmed from the
factory with a preset number (integer or fractional) of drive element 22
revolutions to move the curtain axially across the drive element 22.
There are a variety of reasons, however, why this preset number of
revolutions may change. For example, the drive element 22 may be
shortened (e.g., cut) to accommodate a narrower window 34 or the curtain
has been manually moved with the draw rod 70 and not moved by the pull
cord 72.

[0140] Therefore, in an embodiment, the initial setup of the motor 82 is
able to count the number of revolutions the drive element 22 makes to
fully open and fully close the curtain 44. This setup may be accomplished
by a setup routine in which a program button is pressed once on a remote
control 96 to start the motor 82 moving the curtain 44 and then pressing
the button a second time, either to stop the movement or after the
movement has stopped, which stores the number of revolutions the curtain
44 has moved.

[0141] In a specific embodiment, the number of revolutions can be
confirmed by pressing the program button a third time, which reverses the
motor 82 and moves the curtain 44 in the opposite direction. Pressing the
program button a fourth time, either to stop the curtain 44 or after the
movement has stopped, can cause the number of counts to be compared, and
set a new count in the memory to complete the set up routine. If the
program button on the remote control 96 is not pressed the second time,
the motor 82 can run until the preset count is reached, then shut off.
Alternatively, the assembly can implement some sort of maximum axial
distance detector or force detector, or clutch, such that the motor
stops, or stops rotating the drive element, respectively, when a
threshold force is encountered trying to move the drive attachment
element.

[0142] If it is desired to automatically move the curtain after the
curtain was manually moved, the user can press the program button twice
on the remote control 96, which will cycle the curtain twice. This
resynchronizes the curtain movement count by first moving the curtain to
one distal end of the drive element followed by moving the curtain 44 to
the opposite distal end of the drive section, i.e., two cycles.

[0143] When the curtain 44 is moved towards its fully deployed position,
as shown in FIG. 1, the drive attachment element 36 is driven by the
rotation of the helical groove 24 on the drive element 22 acting on the
feature in the drive attachment element until the drive element 22
rotates a set number of revolutions and stops in the fully deployed
position.

Center Closing Embodiments

[0144] Referring to FIG. 4, a specific embodiment of the curtain assembly
20 is shown in which the curtain 44 used is a center closing curtain 46.
As described above, a center closing curtain 46 is composed of two fabric
panels, a right panel 50 and a left panel 48, which meet in the center of
the window 42 to close and cover the window 34.

[0145] The center closing curtain 46 is in the deployed position and the
window 34 is covered in FIG. 4. The drive element 22 has a clockwise
helical groove 38 and a counter clockwise helical groove 40 formed on the
outer surface 26 of the drive element 22. The clockwise helical groove 38
and counter clockwise helical groove 40 have the same angle and oppose
each other to create the correct movement of the center closing curtain
46 when the drive element 22 rotates.

[0146] To accommodate a center closing curtain 46, the curtain assembly 20
has a left drive attachment element 74 and a right drive attachment
element 76 as shown in FIG. 4. The left drive attachment element 74 is
connected to the adjacent opposing end 66 of the left panel 48 and the
right drive attachment element 76 is connected to adjacent opposing end
66 of the right panel 50. In other words, the left panel 48 has a fixed
end 64 and an adjacent opposing end 66 that is connected to the left
drive attachment element 74. The right panel 50 has a fixed end 64 and an
adjacent opposing end 66 that is connected to the right drive attachment
element 76. There may also be a left draw rod 78 and a right draw rod 80
attached to the left drive attachment element 74 and the right drive
attachment element 76, respectively.

[0147] The tooth 62 of the right drive attachment element 76 can follow
the counter-clockwise helical groove 40 and the tooth 62 of the left
drive attachment element 74 can follow the clockwise helical groove 38,
such that when the drive element is rotated in a first rotational
direction the left panel 48 and right panel 50 both close and when the
drive element is rotated in the opposite direction the left panel 48 and
right panel 50 both open. In a specific embodiment, the drive element has
only one or more clockwise helical grooves 24 on the left end of the
drive element, on which the closed left panel 48 hangs, and the drive
element has only one or more counter-clockwise helical grooves on the
right end of the drive element, on which the closed right panel 50 hangs.

Dual Curtain

[0148] Referring to FIGS. 27-30, a dual curtain assembly 1 is provided.
The dual curtain assembly 1 comprises a rotatable drive element 22
wherein at least one helical structure 24 is formed on the outer surface
26 of the drive element 22; curtain drive elements 36A and 36B having a
corresponding structure that communicates with the helical structure 24
to move the curtain supports axially along the drive element 22 when the
drive element 22 is rotated and; a rotation assembly 33 for rotating the
drive element 22.

[0149] In some embodiments of the invention, the helical structure 24 is a
helical groove and the corresponding structure is a tooth. While the
helical structure 24 is shown in FIGS. 27-30 as a helical groove, the
helical structure is not limited to a groove. Similarly, the
corresponding structure discussed below in some embodiments is a tooth
but is not limited to being a tooth. In some embodiments, the curtain
support includes an outer curtain outer curtain drive attachment element
36A and an inner curtain drive element 36B as shown in FIGS. 27-30 and
explained further below.

[0150] The curtain assembly 1 may further comprise an outer curtain 44A
and an inner curtain 44B; the outer curtain 44A is suspended from the
rotatable drive element 22 while the inner curtain 44B is suspended from
hooks 17 in carrier tracks 12 and 81 that move along the support guide
11. The rotatable drive element 22 comprises at least one drive element
22 having opposing distal end portions 35, 36, where the distal end
having the motor can be referred to as the motor end 58 and the other
distal end can be referred to as the bearing end 59, wherein at least one
helical groove 24 is formed in either a clockwise direction or a
counterclockwise direction on the outer surface 26 of the drive element
22 extending from one distal end portion 35, 36 of the drive element 22
to the opposing distal end portion 35, 36 of the drive element 22.

[0151] When the drive element 22 is rotated, either the outer curtain 44A
or the inner curtain 44B will move along the drive element 22, while the
other curtain is held in place in a non-driving or stall area. Once the
moving driver attachment element 36A or 36B has reached a stall area at
the end of the drive element 22, the non-moving driver attachment element
will be tugged to engage the helical groove 24. This movement of the
outer curtain 44A and the inner curtain 44B, along the helical groove 24
of the drive element 22 is explained in greater detail below. Whether the
outer curtain 44A moves or the inner curtain 44B moves is determined by
the sequence of the movement of the curtains. A system for selecting
either the outer curtain 44A or the inner curtain 44B is explained below.

[0152] As shown in FIG. 27, the outer curtain 44A and inner curtain 44B
may be composed of a single continuous panel of fabric that moves back
and forth across the drive element 22 to the deployed position (covering
the window 34) and to the stored position (not covering the window 34).
Although, there is no limitation on the type of fabric used for the
curtains 44A and 44B, in one embodiment, the outer curtain 44A is a
blackout curtain and the inner curtain 44B is a sheer curtain. Using a
blackout curtain with a sheer curtain to cover the same window 34 allows
the user to use the sheer curtain when some light is desired and then
also to use the blackout curtain when no light is desired. For example,
the blackout curtain may be stored and the sheer curtain may be deployed,
if some light is desired and privacy is needed. The blackout curtain may
be deployed and the sheer curtain may be deployed when no light is
desired. The blackout curtain may be stored and the sheer curtain may
also be stored, when light is desired and privacy is not needed. The dual
curtain assembly 1 disclosed herein allows for these combinations of
positions for the outer curtain 44A (blackout curtain) and the inner
curtain 44B (sheer curtain) as shown in FIGS. 27-30.

[0153]FIG. 27 illustrates a curtain assembly 1 when the outer curtain 44A
is a blackout curtain in the deployed position and the inner curtain 44B
is a sheer curtain in the deployed position. Therefore, in FIG. 27, the
window 34 is covered by the outer curtain 44A or the blackout curtain and
the inner curtain 44B. FIG. 28 illustrates a curtain assembly 1 when the
outer curtain 44A is a blackout curtain in the stored position and the
inner curtain 44B is a sheer curtain in the deployed position. The window
34 is covered by the sheer curtain and the blackout curtain is stored in
this instance. FIG. 29 illustrates a curtain assembly 1 when the outer
curtain 44A is a blackout curtain in the stored position and the inner
curtain 44B is a sheer curtain in the stored position. The window 34 is
left uncovered in this instance.

[0154]FIG. 30 illustrates the preferred embodiment curtain assembly 1
when the outer curtain 44A is a blackout curtain in the deployed position
and the inner curtain 44B is a sheer curtain in the deployed position.
Therefore, in FIG. 27, the window 34 is covered by the outer curtain 44A
or the blackout curtain and the inner curtain 44B. Further, the outer
curtain has the stationary end attached to the end bracket 54 and the
movable end wrapped around the other end bracket 54 on the distal end.
There is also a cut away area to show the position of an external power
supply 43.

Drive Element and Drive Section

[0155] The rotatable drive element 22 and drive element 22 will now be
explained in detail below. The curtain assembly 1 includes a rotatable
drive element 22. FIGS. 31 and 32 show the rotatable drive element 22 and
its components in greater detail. Both the outer curtain 44A and the
inner curtain 44B are connected to the rotatable drive element 22 by the
outer curtain outer curtain drive attachment element 36A or the inner
curtain attachment drive element 5 or various attachment and suspension
elements as explained below. The rotation assembly 33 which rotates the
drive element 22 moves these attachment drive elements which are
connected to the curtains 44A and 44B separately across the drive element
22.

[0156] The rotatable drive element 22 is designed to be installed above a
window 34 similar to a traditional curtain rod. For example, as shown in
FIG. 27, drive element 22 is mounted on axles 52 that are located and
secured in the end brackets 54. The end brackets 54 are adapted for
connection with a window frame, sash or wall. The end brackets 54 may
also include a rubber mounting disk 13 that is compressed when the drive
element 22 is installed to hold the drive element 22 firmly in place and
minimize noise.

[0157] The drive element 22 is connected to a rotation assembly 33 for
rotating the drive element 22 wherein the rotation of the drive element
22 moves the outer curtain drive attachment element 36A and the inner
curtain drive element 36B separately across the helical groove 24 of the
drive element 22. The rotation assembly 33 may be a draw cord 72
connected to the drive element 22 or a motor 82. The drive element 22 may
be rotated manually. For example, a draw cord 72 as shown in FIGS. 27-29
may be connected to the drive element 22 such that the drive element 22
can be manipulated manually to rotate when it is desired to deploy or
store the curtains 44A or 44B. The use of pull cords 72 is well known in
the art.

[0158] The drive element 22 may also be connected to a motor 82, which can
be used to rotate the drive element 22. The motor 82 may be mounted
either inside or outside the drive element 22. In one embodiment, the
motor 82 is mounted inside the drive element 22 and generally concealed
from plain view. Components including axles 52 and bearings 94 may also
be located inside the rotatable drive element 22. A slip ring 28 may be
used to transfer current from the power supply 43 external to the drive
element 22 to the motor 82 in the drive element 22 as shown in FIG. 32.
Alternatively, batteries 84 in a battery tube 86 may be used as shown in
FIG. 31 to power the motor 82. The batteries 84 in the battery tube 86
may be in a spring loaded sleeve to assist with loading and unloading
batteries 84 from the battery tube 86. In some embodiments, the motor
drive adapter 27 as shown in FIG. 59 may also be used to securely attach
or connect the motor 82 to the drive element 22. In other embodiments,
the motor housing 53 fits tightly against the drive element 22 and turns
the drive element 22 when the motor output shaft 87 is held in end
bracket 54 to prevent it from turning.

[0159] In a motorized operation, the user may push a button 98 on a remote
control 96 to turn on the motor 16 to rotate the drive element 22 such
that the sequence selected curtain 44A or 44B moves across the drive
element 22 between a stored position and a deployed position depending on
the user's preference. The remote control 96 and button 98 are shown in
FIGS. 27-29. In other embodiments, the remote control may respond to a
voice command and send a signal to the motor controls, which then causes
the motor 82 to rotate the drive element 22.

[0160] The curtain assembly 1 may also include a remote control 96 having
a control board which generates a signal when the user makes a selection
on the remote control 96. The control board has a transmitter which can
wireless communicate with a receiver which is remotely located from the
transmitter. For example, the receiver may be located in the drive
element 22. The receiver receives the transmitted signal from the
transmitter and transmits it to the motor 82, which will cause the motor
82 to turn on, rotate the drive element 22, and moves one of the curtains
44A or 44B.

[0161] As the drive element 22 rotates, either manually or by a motor 82,
the outer curtain drive attachment element 36A or the inner curtain drive
attachment element 36B is engaged on the drive element 22 and moves
across the drive element 22 to either a deployed or stored position while
the other curtain 44A or 44B remains in place. When the moving curtain
44A or 44B reaches the end of the drive element 22, the stationary
curtain 44A or 44B will be pulled into engagement with the helical groove
24 and move across the drive element 22 to a new position.

[0162] The rotatable drive element 22 is preferably cylindrical in shape
as shown in FIGS. 31, 32, 34, and 59, which shows the drive element 22
having an inner tube, referred to as an inner drive element 9, and an
outer tube or sleeve 63. However, the shape of inner drive element 9 and
an outer tube or sleeve 63 of the drive element 22 are not limited and
can be non-circular. In an alternative embodiment, as shown in FIG. 60,
the rotatable drive element 22 may be tri-lobed. In this case the drive
element is a spiraled tube having creases that a ball bearing can ride
in.

[0163] The drive element 22 may vary in size. For example, the drive
element 22 may be the width of the window 34 or it may be wider than the
window 34. There is no limitation on the diameter of the drive element 22
other than space needed inside a room. Preferably, the drive element 22
is configured to mount a motor 82 inside the drive element 22 rather than
mounting the motor 82 outside the drive element 22. Using the inside of
the drive element 22 to conceal the motor 82 may give a more
aesthetically pleasing design for a curtain assembly 1 or 20. Any number
of materials may be used to fabricate the drive element 22 provided the
drive element 22 can support the weight of the outer and inner curtains
44A, 44B.

[0164] The drive element 22 comprises a guide structure 24, such as a
helical groove, over at least one or more portions of the length of the
drive element 22. The drive element 22 has opposing distal end portions
35, 59 and may be any length along the longitudinal axis 60 of the drive
element 22. The longitudinal axis 60 of the drive element 22 is shown in
FIGS. 27-30. The length of the guide structure along the drive element 22
is a factor in determining how far the curtain 44A or 44B will travel
across the drive element 22, i.e., the entire length of the drive element
22 as opposed to some shorter section of the drive element 22.

[0165] In an embodiment, the drive element 22 has at least one helical
groove 24 that is formed in either a clockwise direction or a
counterclockwise direction on the outer surface 26 of the drive element
22 extending from one distal end portion 35, 59 of the drive element 22
to the opposing distal end portion 35, 59 of the drive element 22. FIG.
49 illustrates a left hand drive element 22 in which the helical groove
24 is in a clockwise direction and also illustrates a right hand drive
element 22 in which the helical groove 24 is in a counterclockwise
direction.

[0166] In some embodiments, the drive element 22 may have two helical
grooves 24, one formed in the clockwise direction and one formed in the
counterclockwise direction as shown in FIG. 59. A drive element 22 having
a drive element 22 with helical grooves 24 in both directions is
particularly useful for center closing curtains 46 as explained below.

[0167] In the preferred embodiment, the drive element 22 may have two
helical grooves 24 in the same direction, where the inner drive
attachment element 36B has two teeth 5a and 5b spaced 180 degrees apart
and the outer drive attachment element 36A has two teeth 4a and 4b spaced
180 degrees apart, such that tooth 4a, and tooth 5a, engages one of the
helical grooves and tooth 4b, and tooth 5b, engages the other helical
groove at the same time, respectively, so as to add stability with
respect to driving Drive attachment element 36A, and 36B, respectively.

[0168] In other embodiments, the drive element preferably has four helical
grooves 24, two clockwise helical grooves 24 and two counterclockwise
helical grooves 24 as shown in FIG. 59. A cross-sectional view of the
rotatable drive element having four helical grooves 24, two clockwise
helical grooves and two counterclockwise helical grooves is shown in FIG.
59. Helical grooves are preferably spaced approximately 180 degrees
apart. The clockwise helical grooves 24 and the counterclockwise helical
grooves 24 preferably opposed each other and are spaced 180 degrees
apart. The profile of the helical grooves 24 is self-centering to allow
the first outer drive tooth 4a and the first inner drive tooth 5a to
traverse the intersection of the clockwise helical groove and the counter
clockwise helical groove without binding.

[0169] The helical groove 24 forms a path through the drive element 22 of
the drive element 22 as shown in FIGS. 27-30. As the drive element 22
rotates, one of the curtains 44A or 44B is pulled along the helical
groove 24 across the drive element 22 into a deployed or stored position.
Both the clockwise and the counterclockwise helical grooves 24 will cause
the curtain 44A or 44B to move axially across the drive element 22 when
the drive element 22 rotates and the curtain drive elements 36A or 36B
are engaged with the helical groove 24.

[0170] The helical grooves 24 may be formed by forming grooves into the
outer surface 26 of the drive element 22 such that the grooves are
recessed from the outer surface 26 of the drive element 22.
Alternatively, the helical grooves 24 may be formed as protrusions that
project or bulge from the outer surface 26 of the drive element 22. The
protrusions may be formed any means, for example, by winding material
around the outer surface 26 of the drive element 22.

[0171] The angle of the helical groove 24 may vary and therefore, may
differ in the amount of time that it takes to travel across the drive
element 22. For example, a helical groove 24 with a larger angle may
create a shorter path for the curtain 44A, 44B to travel and result in a
faster moving curtain 44A or 44B for a given rotational speed of the
drive element. In some embodiments, the angle of the helical grooves 24
may vary along the drive element 22 such that the curtain 44A, 44B may
move at different speeds along the drive element 22, for a given
rotational speed of the drive element, if desired. The angle of the
helical groove 24 preferably varies from 30 degrees to 60 degrees and is
most preferably 45 degrees.

[0172] In an alternative embodiment, the drive element 22 may be formed
from a drive sleeve or outer tube 63 that is sized to fit around a
portion of an inner drive element 9, which can be, for example, an inner
tube 61. In this case, the drive sleeve has at least one helical groove
24 in a clockwise or counter clockwise direction formed on the outer
surface of the sleeve. The drive element 22 must be able to translate the
torque from the rotation assembly to axially movement of the curtain
support or attachment elements 36A, 36B across the drive element 22, and
the drive sleeve may be made from a high lubricity material. Therefore,
the drive sleeve can be secured to the inner drive element 9 such that
the sleeve does not slide up or down the drive element 22 or rotate
around the inner drive element 9. It may also be desired to remove the
sleeve from the inner drive element 9 and replace it with another sleeve.
Using a sleeve to form the drive element 22 has the advantage that the
helical groove 24 or the length of the drive element 22 may be easily
changed by removing the sleeve and replacing it without fabricating a new
drive element 22.

Attachment Elements and Teeth

[0173] In some embodiments, the curtain assembly 1 may include at least
one outer curtain drive attachment element 36A connected to the drive
element 22 and has a drive teeth 4a and 4b that communicates with the
helical groove 24 to move the outer curtain drive attachment element 36A
axially along the drive element 22 when the drive element 22 is rotated.
The outer curtain drive attachment element 36A is connected one end of
the outer curtain 44A. The curtain assembly 1 may include at least one
inner drive attachment element 36B connected to the drive element 22 and
has a drive teeth 5a and 5b that communicates with the helical groove 24
to move the inner drive attachment element 36B axially along the drive
element 22 when the drive element 22 is rotated. The inner drive
attachment element 36B is connected one end of the inner curtain 44B.

[0174] FIGS. 45-47 show the front and cross-sectional views of the outer
curtain drive attachment element 36A as well as the drive teeth 5a and
5b. Both the first outer drive tooth 5a and the second outer drive tooth
5b are configured to communicate with the helical groove 24 of the drive
element 22. The first outer drive tooth 5a and the second outer drive
tooth 5b are positioned inside the outer drive attachment element 36A
which shows the angle α of one drive tooth and both the angles are
45 degrees.

[0175] FIGS. 39-41 show the front and cross-sectional views of an
embodiment of an inner drive attachment element as well as the drive
teeth 4a and 4b. Both the inner drive tooth 4a and the inner drive tooth
4b are configured to communicate with the helical groove 24 of the drive
element 22. The inner drive tooth 4a and the inner drive tooth 4b are
positioned inside the drive attachment element which shows the angle
α of one drive tooth and both the angles are 45 degrees. In this
embodiment, the inner carrier attachment post 31 is located at a portion
of the inner drive attachment element designed to interconnect with a
carrier in the inner curtain carrier track 81.

[0176] FIGS. 36-38 show the front and cross-sectional views of an
alternative inner drive attachment element 36B as well as the drive teeth
4a and 4b. Both the inner drive tooth 4a and the inner drive tooth 4b are
configured to communicate with the helical groove 24 of the drive element
22. The inner drive tooth 4a and the inner drive tooth 4b are positioned
inside the drive attachment element which shows the angle α of one
drive tooth and both the angles are 45 degrees. In this embodiment, the
inner carrier attachment post 31 can be the same as the outer carrier
attachment post 6 of FIGS. 45-47 designed to interconnect with a carrier
in the outer curtain carrier track 12, and the attachment points of the
inner curtain can attach via hooks to the receiver for hooks 99.

[0177] As shown in various figures, the outer curtain outer curtain drive
attachment element 36A and the inner curtain drive element 36B are
ring-shaped and slide over the drive element 22. Although a different
construction may be used for the outer curtain outer curtain drive
attachment element 36A and the inner curtain drive element 36B, they are
be able to connect to the appropriate ends of the outer curtain 44A and
the inner curtain 44B and engage the helical groove 24 and move across
the drive element 22.

[0178] The outer curtain outer curtain drive attachment element 36A is
preferably provided with a slot or a hole 99 into which a traditional
curtain hooks or pins can be used to connect the ends and upper edge of
the outer curtain 44A to the appropriate attachment element. FIG. 34
illustrates an example of the hole 99 and a pin hook 14 on an outer
curtain idler attachment element 67A. In another embodiment, as shown in
FIG. 60, a traditional curtain ring is used. The inner curtain 44B is
suspended by S-hooks 17 in inner curtain carrier track 81 in support
guide 11. Curtain pins, hooks and rings are well known in the art to hang
curtains 44A, 44B.

[0179] The drive tooth 5a on the outer drive attachment element 36A and
the drive tooth 4a on the inner drive attachment element 36B may have the
same construction. The outer drive tooth 5a and the inner drive tooth 4a
are both designed to engage with the helical groove 24 of the drive
element 22 to drive the curtain 44A or 44B across the drive element 22.
In one embodiment, the drive tooth 5a is formed on an angle inside the
body of the outer curtain drive attachment element 36A. The angle is
specifically designed to engage the helical groove 24 on the drive
element 22. A design consideration is to maximize the contact between the
rotating drive element 22 and the outer drive attachment element 36A
and/or inner drive attachment element 36B to carry the weight of the
curtain 44A or 44B. The outer curtain outer curtain drive attachment
element 36A and the drive teeth 5a and the inner curtain drive attachment
element 36B teeth and the inner curtain teeth 4a, in some embodiments of
the present invention, are adjustable. The adjustability of these
components allow the user of the curtain assembly to set the correct
timing on the location of the outer curtain drive attachment element(s)
36A and inner curtain drive attachment element(s) 36B in relationship to
the helical grooves 24.

[0180] Although the curtain support described in the embodiments above is
an outer curtain outer curtain drive attachment element 36A and an inner
curtain drive attachment element 36B, other embodiments for the curtain
support may be used as well.

Outer Curtain Idler Attachments

[0181] The curtain assembly 1 may further comprise a plurality of outer
curtain idler attachment 67A connected to the rotatable drive element 22
for sliding movement along the drive element 22 wherein the adjacent ends
of the outer curtain 44A that are not connected to the outer curtain
drive attachment element 36A are suspended from the drive element 22
using one or more outer idler attachment elements 67A.

[0182] The outer curtain 44A has the movable end connected to the outer
drive attachment element 36A. The non-movable end of the outer curtain
44A can be attached to the end bracket 54. Outer idler attachment
elements 67A may be used to suspend the remaining attachment points of
outer curtain 44A to the drive element 22. The outer idler attachment
elements 67A are connected to the rotatable drive element 22 as shown in
FIGS. 31-32 and 34-35. An enlarged view of the outer idler attachment 67A
is shown in FIGS. 42-44.

[0183] The outer idler attachment 67A may be shaped similar to the outer
drive attachment element 36A and inner drive attachment element 36B. The
outer idler attachment 67A can have a smooth bore to allow free movement
along the drive element 22 of the tube as the curtain 44A is moved or may
have a tooth on each outer idler attachment 67A to assist in the movement
of the curtain 44A.

[0184] The outer idler attachments are also linked to the outer curtain
carriers 69 by the insertion of the outer carrier attachment post 6 on
the outer idler attachment elements 67A into the aperture 55 on outer
curtain guide carrier 69. The outer current carriers are then positioned
in the outer curtain carrier track 12 in the support guide 11. This
prevents the outer curtain idler attachment 67A from rotating or binding
the rotation of the element 22.

[0185] The outer curtain idler attachment 67A are preferably provided with
a slot or a hole 99 into which a traditional curtain hook or pin can be
used to attach the ends of the outer curtain 44A to the outer curtain
idler attachment. FIG. 42 illustrates an example of this hole 99 and a
pin hook 14 on an outer curtain idler attachment 67A.

[0186] The inner curtain 44B can have the stationary end connected to the
end bracket 54 and other end attached to the inner drive attachment
element 36B. The inner curtain carrier track 81 and hooks 17 may be used
to suspend the remaining attachment points of the inner curtain 44B to
the inner curtain carrier track 81 of the support guide 11 along the axis
of the drive element 22.

[0187] The outer curtain 44A is connected to the outer drive attachment
element 36A and the inner curtain 44B is attached to the inner drive
attachment element 36B. This arrangement ensures that the outer curtain
44A and inner curtains 44B drive attachment elements 36A and 36B are
linked together on the same drive element 22 and they are able to move in
sequence across the drive element 22.

Outer Driver Stall Area and Inner Driver Stall Area

[0188] The curtain assembly 1 preferably includes at least one outer
driver stall area 100 positioned to one end of the drive element 22 to
engage and disengage the outer drive attachment element 36A from the
helical groove 24 of the drive element 22.

[0189] The curtain assembly 1 also preferably includes at least one inner
driver stall area 15 positioned on the distal end of the drive element 22
that is configured to hold the inner curtain drive element 36B in place
while the outer drive attachment element 36A moves through the drive
element 22.

[0190] FIGS. 33-34 show an outer driver stall area 100 at one distal
portion 35, 59 of the drive element 22. FIG. 51 shows the inner driver
stall area 15 at the opposing distal end 35, 59 of the drive element 22.
FIG. 49 shows a rotatable drive element 22 having an outer driver stall
area 100 at each distal end portion of the drive element 22 and an inner
driver stall area 15 positioned in between the two stall areas s 100. The
rotatable drive element 22 shown in FIG. 49 will accommodate the outer
curtains 44A and inner curtains 44B, as center closing curtains.

[0191] Enlarged views showing details of the outer driver stall area 100
are shown in FIG. 34. The outer driver stall area 100 is a section of the
drive element 22 along the drive element 22 without a helical groove 24
formed on the outer surface 26 of the drive element 22. The outer driver
stall area 100 interrupts the movement of the outer curtain 44A or the
inner curtain 44B along the helical groove 24 therefore allowing the
curtain assembly 1 to change which attachment element (either the outer
curtain drive attachment element 36A or the inner curtain drive element
36B) is engaged with the helical groove 24.

[0192] The outer driver stall area 100 also serves to collect or provide a
space for the outer curtain idler attachment elements 67A as well as the
outer curtain drive attachment element 36A. For example, when the outer
curtain drive attachment element 36A is engaged and moves through the
drive element 22, it will reach the outer driver stall area 100 at the
end of the drive section. The outer driver stall area 100 stops the
movement of the outer curtain drive attachment element 36A in the helical
groove 24 and temporarily stores the outer curtain drive attachment
element 36A. The outer curtain idler attachment elements 67A that are
holding the remaining adjacent end of the curtain 44A are pushed by the
outer curtain drive attachment element 36A and ultimately stack up in the
outer driver stall area 100 until the outer curtain drive attachment
element 36A becomes disengaged with the helical groove 24 and will remain
stalled until the drive element 22 rotates in the opposite direction. As
this disengagement occurs, the outer curtain drive attachment element 36A
pushes against the outer curtain idler attachment 67A in the outer driver
stall area 100 which moves the inter-curtain engager 49 toward the end
bracket 54. The inner curtain 44B, being the correct length, pulls the
inner curtain drive element out of the inner driver stall area 15 and
into engagement with the helical grooves 24.

[0193] In some embodiments, the inner driver stall area 15 is positioned
at the distal end 59 of the drive element 22 opposite the outer driver
stall area 100 and functions to hold the inner curtain drive element 36B
stalled in place. In other embodiments, at least one inner driver stall
area 15 is positioned between two outer driver stall areas 100, as shown
in FIG. 49. The position of the inner driver stall area 15 on the drive
element 22 defines the end of the portion of the drive element 22 where
the inner curtain drive element 36B travels on the drive element 22.

[0194] As described above, FIG. 27 shows a curtain assembly 1 when the
outer curtain 44A (blackout) is in the deployed position and the inner
curtain 44B is also in the deployed position. At this moment, the outer
curtain 44A is fully extended and the curtain drive attachment element
36A is in the helical groove 24 at one distal end of the drive element 22
and the inner curtain drive element 36B is in the inner driver stall area
15 at the same end of the drive element 22. To change the positions of
the curtains such that the outer curtain 44A is in the stored position
and the inner curtain 44B stays in the deployed position as shown in FIG.
28, the drive element 22 starts to rotate in the opposite direction. The
rotation of the drive element 22 will move the outer curtain drive
attachment element 36A, attached to outer curtain 44A, collapsing curtain
44A into the stored position until outer curtain drive attachment element
36A moves into the outer driver stall area 100 where it will push against
the outer idler attachment elements 67A in the outer driver stall area
and force the inter-curtain engager 49 toward the end bracket 54 creating
a tug pressure on the inner curtain 44B and the inner curtain drive
element 36B because the inner curtain 44B is the correct length and
extended. This tug pressure pulls the inner curtain drive element 36B out
of the inner driver stall area 15 and into engagement with the helical
groove 24 positioning the curtains as shown in FIG. 28. When the inner
curtain 44B is fully extended, the inner curtain drive element 36B will
move into the inner driver stall area 15. Because the inner curtain is
now extended, the outer curtain drive attachment element 36A will be
pulled into the helical groove 24 prepared to deploy the outer curtain
44A. Because the inner driver stall area 15 does not have a helical
groove 24, the inner curtain attachment 36B element is prevented from
moving or stalled along the drive element 22.

[0195] As the outer drive attachment element 36A moves through the drive
element 22, the outer curtain 44A will move from the stored position to
the fully deployed position and the outer drive attachment element 36A
moves up to and against the inner curtain drive element 36B in the inner
driver stall area 15 and stops the drive element 22 from rotating The
curtain assembly 1 will then be as shown in FIG. 27, with the outer
curtain 44A in the deployed position and the inner curtain 44B in the
deployed position.

[0196] To move the inner curtain 44B to the stored position as shown in
FIG. 29, the drive element 22 will rotate and the outer drive attachment
element 36A moving into the outer driver stall area 100 will pull the
inner curtain drive element 36B from the inner driver stall area 15
thereby engaging the inner curtain drive element 36B with the helical
groove 24. The inner curtain drive element 36B will move the curtain 3
through the drive element 22 from the deployed position to the stored
position at the other distal end of the drive element 22 until the inner
curtain drive element 36B pushes against the outer drive attachment
element 36A and stops the drive element 22 from rotating. At this point,
the inner drive attachment element 36B is engaged with the helical groove
24.

Guide Mechanism

[0197] The curtain assembly 1 preferably includes a support guide 11
wherein the guide means facilitates the movement of the outer and inner
curtains 44A, 44B along the drive element 22 without misalignment. The
support guide 11 may also assist with the spacing of the curtain panels
when the outer curtain 44A or the inner curtain 44B is fully extended in
the deployed position.

[0198] In one embodiment, the support guide 11 is an elongated pair of
channels positioned parallel to the rotatable drive element 22. The
support guide 11 is shown in several of the figures, including an end
view in FIG. 48. The inner curtain carrier track 81 and the outer curtain
carrier track 12 are the same part but are numbered differently and
discussed differently because their functions are different. The inner
curtain carriers 93 have apertures 55 where an inner carrier attachment
post 31 on the inner curtain drive element 36B is inserted at one end of
the inner curtain and an inner carrier attachment post 31 on the
inter-curtain engager 49 is inserted on the other end. The remaining
inner curtain carriers 93 have S-hooks 17 inserted into the aperture 55
as known in the art.

[0199] The outer drive attachment element 36A and the outer curtain idler
attachment 67A preferably have a hanger pin hole 99 wherein the pin hooks
14 are connected to the attachment elements and support the outer curtain
44A. Further, these attachment elements 36A and 67A to the outer curtain
44A are guided and held from rotation by the insertion of the outer
carrier attachment posts 6 into the apertures 55 in curtain carriers 69
riding in the outer curtain carrier track 12 in support guide 11.

[0200] This arrangement provides the user with the option of manually
operating the movement of the curtains 44A or 44B across the drive
element 22. For example, the user may decide to manually operate the
curtain assembly 1. The user could turn off the motor 82 and rotate the
drive element 22 manually by using the pull cord 72.

[0201] The motor 82 for the curtain assembly 1 may be programmed from the
factory with a preset number of drive element 22 revolutions to move the
curtain the width of the window 34 opening. However, there are a variety
of reasons why this preset number of revolutions may change. For example,
the drive element 22 may be shortened to accommodate a narrower window
34.

[0202] Therefore, the initial setup of the motor 82 may be able to count
the number of revolutions the drive element 22 makes to fully open and
fully close the curtains 44A or 44B. This may be accomplished by a setup
routine where pressing a program button 98 on a remote control 96 once to
start the motor 82 moving the curtain 44A, 44B and then pressing the
button 98 another time to stop the movement which will store the number
of revolutions the curtain 44A, 44B has moved.

[0203] The number of revolutions can be confirmed by pressing the program
button 98 a third time, which will reverse the motor 16 and move the
curtain 44A, 44B in the opposite direction. Pressing the program button
98 a fourth time will stop the curtain 44A, 44B, compare the counts, and
set a new count in the memory to complete the set up routine. If the
program button 98 on the remote control 96 is not pressed the inner time,
the motor 82 will run until the preset count is reached, then the motor
82 will shut off. If the number of revolutions is ever lost, the controls
can reset a zero position when the outer curtain drive attachment element
36A stops the drive element 22 from rotating when the outer curtain 44A
is fully deployed, as shown in FIG. 52 or when the outer curtain 44A and
the inner curtain 44B are fully stored and the inner curtain drive
element 36B stops the drive element 22 from rotating, as shown in FIG.
54.

[0204] In specific embodiments, the drive element 22 stops rotating when
the inner driver attachment element 36B and the outer driver attachment
element 36A are brought into contact at either end of the drive element.
When the inner driver attachment element 36B and the outer driver
attachment element 36A are brought into contact, the inner driver
attachment element 36B and the outer driver attachment element 36A bind
together and their teeth bind in the drive element's grooves. The
interconnection of the inner driver attachment element 36B and the outer
driver attachment element 36A to the support guide 11 in opposite
orientations helps to cause this binding. Once the inner driver
attachment element 36B and the outer driver attachment element 36A bind
together, the drive element is bound, and the controller board senses
that the driver element is no longer rotating and stops running the
motor.

[0205] In specific embodiments, the stall area 100 and/or 15 prevents one
of the inner driver attachment element 36B and the outer driver
attachment element 36A from moving down the drive element 22. When the
inner driver attachment element 36B and the outer driver attachment
element 36 meet each other, the axial force (down the rotational axis of
the rotating drive element) binds the stalled driver to the still-driving
driver. This, coupled with the weight of the curtain hanging from the
outer driver and the interconnection of the inner driver attachment
element 36B and the outer driver attachment element 36A to the support
guide, causes the driver whose teeth are still engaged to the tube to
bind up with the rotational drive element. At that point, this driver is
being torqued so as to try and rotate around the axis of rotation and
prevented from such rotation by the support guide, which stalls the motor
and signals the controller board to stop running the motor.

[0206] The dual curtain assembly mounted in rubber mounting disk 13
increases the sensitivity of motion such that a person can pull on the
stored or deployed curtain and activate the motor to move the curtain in
the opposite direction from the last movement. The motor controls will
count the number of revolutions and when the predetermined count is
matched it will shut the motor down.

Center Closing Embodiments

[0207] An alternative embodiment of the dual curtain assembly 1 is shown
in FIGS. 49 and 50 in which the outer curtain 44A and the inner curtain
44B are center closing curtains. A center closing curtain is composed of
two fabric panels, a right panel and a left panel, that meet in the
center of the window 34 to close and cover the window 34. In FIG. 50, the
outer curtain 44A is a center closing blackout curtain that is in the
deployed position and the inner curtain 44B is a center closing sheer
curtain that is also in the deployed position. In FIG. 49, the outer
curtain 44A is a center closing blackout curtain that is in the stored
position and the inner curtain 44B is a center closing sheer curtain that
is in the deployed position. In this embodiment, the drive element 22 of
the drive element 22 preferably has four helical grooves 24, two formed
in the clockwise direction and two formed in the counterclockwise
direction. For example, the opposing helical grooves 24 shown in FIG. 59
create the correct movement of the center closing curtains with one motor
82 turning the drive element 22 in one direction. FIG. 59 shows an
enlarged cross-sectional view of the rotatable drive element according to
one embodiment of the curtain assembly showing the four helical grooves
formed on the outer surface of the drive element. FIG. 59 also shows an
enlarged perspective view of the rotatable drive element according to one
embodiment of the curtain assembly showing the four helical grooves
formed on the outer surface of the drive element.

[0208] To accommodate center closing curtains, the curtain assembly 1 has
a left outer drive attachment element 36A, a right outer drive attachment
element 36A, a left inner drive element 36B and a right inner drive
attachment element 36B as shown in FIGS. 49 and 50. The left outer drive
attachment element 36A is connected to one end of the left panel of the
outer curtain 44A. The right outer drive attachment element 36A is
connected to one end of the right panel of the outer curtain 44A. The
left inner drive element 36B is connected to an adjacent end of the left
panel of the inner curtain 44B and the opposite end of the inner curtain
is attached to the end bracket 54. The right inner drive attachment
element 36B is connected to adjacent end of the right panel of the inner
curtain 44B and the opposite end of the inner curtain is attached to the
end bracket 54.

[0209]FIG. 49 shows an embodiment of a rotatable drive element 22 in
which the outer curtain 44A and the inner curtain 44B are both center
closing curtains. There is an outer driver stall area 100 positioned at
each distal end of the rotating drive element 22 and an inner driver
stall area 15 positioned between the outer driver stall area s 100. For
example, there is a left outer driver stall area 100 positioned along the
drive element 22 to engage and disengage the left outer drive attachment
element 36A from the helical groove 24 of the drive element 22 and a
right outer driver stall area 100 positioned along the drive element 22
to engage and disengage the right outer drive attachment element 36A from
the helical groove 24 of the drive element 22. The inner driver stall
area 15 is configured to hold the left inner n drive element 36B in place
while the left drive attachment element 36B moves through the drive
element 22. The same inner driver stall area 15 is also configured to
hold the right inner drive attachment element 36B in place while the
right inner drive attachment element 36B moves through the drive element
22. Alternative embodiments can have two separate inner driver stall area
15. FIG. 49 illustrates that the left and right inner drive attachment
elements 36B will meet in the center 42 of the window 34 when the outer
curtain 44A is deployed and the inner curtain 44B is stored to minimize
light leakage. Therefore, the single inner driver stall area 15 in some
embodiments is wide enough to fit both the left inner curtain drive
element 36B and the right inner curtain drive attachment element 36B.

[0210] FIGS. 63A-63L show flowcharts implemented by the control system for
specific embodiments of the invention.

Embodiment

Method and Apparatus for Linked Horizontal Drapery Panels Having Varying
Characteristics to be Moved Independently by a Common Drive System

[0211] A system having two horizontal moving curtains or draperies made
from dissimilar materials can display each of the two curtains
individually, using a common drive system. The drive system can be
operated manually by, for example, a pull cord or a draw rod, and can be
motorized. In the embodiment, shown in FIGS. 64-77, the horizontal
movement of the curtain or drapery is accomplished by one or more
grooves, such as one or more helical grooves, formed on the outer surface
of a rotating element, such as a roll shade tube, to move the curtain or
drapery horizontally when the tube rotates. The drive element can also
utilize a sleeve over a tube, such that the sleeve has the one or more
grooves and rotating the tube rotates the sleeve. The sleeve and tube can
be the same material or different materials. A sleeve made of
non-metallic material over a metallic tube can provide the strength of a
metallic tube with a low friction non-metallic surface of the sleeve
material to interconnect with the attachment elements.

[0212] The curtains or draperies (such as sheer and blackout curtains or
draperies) are suspended by loosely fitting attachment elements that
freely traverse longitudinally along the tube with a protrusion or
protrusions on the inside of the drive element fitted into the helical
grooves in the rotating element. The remaining attachment elements are
loose fitting where the curtain materials can be moved independently
(freely) along the tube to cover or uncover the opening as needed. This
drive system can be used on shade systems referred to as a single set of
shades, where a single set of shades traverse the same tube and can be
stored to the right or the left of the opening. This drive system can
also be used on a center opening set of shade systems, where the left
hand and right hand sets of shades open from the middle of the opening
and the shades are stored to either side of the opening when the shades
are open.

[0213] In describing this embodiment, the terms draperies, curtains, and
shades are used interchangeably. The drive mechanism for the two
draperies can be linked together such that a common drive system can move
each curtain individually and/or together. The shades can be moved by
rotating the drive element, which in the embodiment shown in FIGS. 62-77,
is a tube. The tube can be motorized so that a motor drives the tube. The
system can be designed such that the tube can be manually rotating the
drive element. Specific embodiments can allow both manual and motorized
driving of the tube.

[0214] A magnetic attachment mechanism can be incorporated such that one
shade can be manually moved by disconnecting a magnet from the drive
element. The system can be designed such that the magnet of the magnetic
attachment mechanism is automatically engaged when the magnets are moved
slowly enough when the magnets are proximate to each other, and when the
magnets are moved rapidly with respect to each other when the magnets are
proximate to each other the magnets will not engage. The proximity of
magnet 124 and magnet 135, and their orientation with respect to each
other are the primary factors as to whether or not the magnets engage
each other so as to couple the outer driver and inner driver. The speed
of passing is also a factor. Magnet 124 is allowed to pivot about an axis
while magnet 135 is held relatively stationary at some pre-determined
angle. When the opposite poles of the magnets are proximate, they engage.
As the pivoting magnet is moved past the relatively stationary magnet,
the opposite poles are force passed each other (by virtue of the
relatively stationary magnet being pushed into the "cup" mechanism, and
the pivoting magnet continuing its linear travel along the rotating
element's rotational axis. As the edges of the magnets pass each other,
they suddenly repel each other. The pivoting magnet then turns its other
pole toward the stationary magnet. When the magnets are in this
configuration and the movement is reverse, they maintain this repelled
state until the pivoting magnet reaches a position where the edges of the
magnets again align. In this scenario, the proximity is very much larger
than when the magnets repelled. Thus, the system has been "re-set" and is
prepared to engage the magnets again.

[0215] The outer driver can either drive away and not stop, or drive away,
stop, return to some intermediate position and pick up the inner driver,
and then drive away. This intermediate position can be defined in the
software, and can be set by the user. This intermediate position is where
the magnets are proximate to the point that the force between them can
move the inner driver out of the cup.

[0216] The magnets maintain a repelling force while the swivel magnet is
moving to the open position. Speed is still a factor, but in specific
embodiments, speed is not the only factor as to whether the out driver
couple sot the inner driver. The magnets are switching between a
repelling state and an attracting state by using the magnetic field
between poles (around the edges of the physical magnet) to pivot the
swivel magnet in and out of attraction.

[0217] The automatic engagement allows both draperies to be moved as one
of the shades to be moved manually with a rod or the shade, and once the
movement is complete, the motor can rotate the drive element or the
drapery drive tube can be manually rotated with a draw cord. In an
embodiment, both draperies can be moved as appropriate via the motor, and
can be moved together with the motor, and one of the draperies can be
moved by the motor or by hand. A specific embodiment can allow the sheer
drapery to be manually moved by conventional mechanism, such as with a
rod or by hand, where the sheer drapery can be slid along the track much
like with a conventional curtain rod.

[0218] In an embodiment, by allowing different curtains to be moved by the
same drive element, two curtains, such as a sheer drapery and a blackout
drapery, can be operated such that neither are covering the window, the
sheer drapery is covering the window, or both the sheer drapery and the
blackout drapery are covering the window. This can be reversed if the
sheer and the blackout draperies are reversed. In an embodiment, the
sheer drapery can be translucent and the blackout drapery can be opaque.

[0219] One or more grooves, such as helical grooves, that intercoupled
with the attachment elements that are driven by the one or more grooves
to move the draperies can be formed into the drapery or drive element or
formed into a sleeve that is positioned over the drive element. Both
clockwise and counter clockwise grooves can be formed into the same drive
element or sleeve. In a preferred embodiment, all drive components,
controls, and the power source can be internal to the drapery tube or
drive element. Storing the drive components, the controls, and the power
supply internal to the support tube can efficiently utilize the space
required for a motorized shade, can reduce or eliminate the need for belt
and track assemblies used in current technology, and can also eliminate
the need for a motor mounting on one end of the shade assembly.

[0220] The drapery system can incorporate one or more guide tracks for one
or both of the two draperies, where both draperies are driven by a common
driver.

[0221] Specific embodiments employ the drive system with a center opening
shade system, where the single sets of shades meet in the middle of the
opening. The black-out shades can compress the stored sheer shades and
overlap with the sheer shades such that no space between the shades is
visible and the system does not allow light to show through into the
room.

[0222] The design of the system can allow a simple cut-down ability, by,
for example, removing an end cap and cutting the drapery tube. The
ability to easily cut down the length of the tube allows the system to
fit into narrower windows.

[0223] Embodiments can prevent a gap in the center of the window with an
open center system using dual tubes sets of shades. In an embodiment,
center opening sets of shades can have a motorized drive element and one
motor, where movement of the curtains on the drive element in opposite
directions (e.g., left to right and right to left) can be accomplished by
having grooves having opposite handed rotation (e.g., right vs. left, or
clockwise vs. counter clockwise) on the drive element and rotating the
motor in the same direction. In a specific embodiment, the motorized
drive element or sleeve can have double formed helixes in both the
clockwise and counterclockwise direction. In a specific embodiment,
clockwise grooves on the portion of the drive element on one side of
center and counterclockwise grooves on the drive element on the other
side of center can be used to move the curtain on one side of center in a
first direction and the curtain on the other side of center in the
opposite direction of rotation of the drive element. The drive element
can then be rotated in the opposite direction to move the curtains in the
opposite direction. Again, an embodiment can have one motor, one
controller, and one power supply to drive the drive element on both sides
of center. When the same portion of the drive element has both clockwise
and counter clockwise grooves, the drive element can be used on either
side of center and can, therefore, reduce the need to keep two types of
drive element in stock and to keep same organized. Further, such drive
elements with two clockwise and counterclockwise grooves can be used for
right hand, left hand, and/or center opening shade systems, by selection
of the appropriate drive and lead attachment elements.

[0224] Referring to FIGS. 64-67 the motorized assembly can be powered by a
battery pack internal to the drive elements 114 and 115, a battery tube
101 attached to an end bracket, a battery tube 101 attached to the wall
of a structure with a bracket 106, or a battery tube 101 attached
somewhere else. There can also be a low voltage transformer supplying
power to the outer draperies as known in the art. The draperies are hung
from the outer drapery clips 119, which are positioned and moved in the
cover track 111, track 111i, and the inner draperies are hung from the
inner drapery clips 118 which are positioned and moved in the cover track
111 track 111o. There are also outer driven clips 117 driven along the
track 111i by the outer driver 120 and inner driven clips 116 driven
along the track 111o.

[0225] Although a center open track assembly is shown in FIGS. 64-69 and
78-77, the right hand side of the assembly shown in FIGS. 64-69 and 76-77
can be for a right hand drapery and the left hand side of the assembly
shown in FIGS. 64-65 and 76-77 can be for a right hand drapery, within
the intent of this disclosure.

[0226] The drapery assembly can be mounted over an opening with brackets
as shown, or via a variety of methods, as known in the art.

[0227] Referring to FIG. 69, the end of each drive element ending in the
middle is shown. This end can be opposite the motor or end bearing
assembly 139. In a preferred embodiment, tubes 114, 115 have a keyed
insert 127 into which a bearing 128 fits. The bearings are permanently
mounted on the end plates 112 on an extruded hole 140. The bearing allows
tubes 114, 115 to rotate with minimal friction. A drive gears and shaft
assembly 129 connects each keyed insert 127 to the other, through the
center of the extruded hole 140 on the end brackets 112. In this way,
rotation of one of the tubes 114, 115 will cause the rotation of the
other tube 114, 115.

[0228] Referring to FIGS. 70-74, which show a top view of the inner
curtain driver 22 with a portion of the cover track 11 cut away, the
inner drivers 122 and 123, outer drivers 120 and 121, and inner driver
cups 125 and 126 all work together to connect and disconnect the outer
drapery from the inner drapery. Such connection and disconnection
utilizes magnets and control of their relative orientation, and location,
and movement of the outer drivers either below a critical speed or above
the critical speed during a certain portion of the connecting and
disconnecting process. The outer drivers 120 and 121 have a small
pivoting magnet 124 that works with a corresponding inner driver 122 and
123 that has a stationary magnet 135. When connected, magnet 124 and
magnet 135 face each other with opposite poles.

[0229] As the outer drivers 120, 121 drive toward the center of the
assembly (end brackets 112), the inner driver 122, 123 is pushed along
until it reaches a cut-out 141 in the guide extrusion. Within the cut-out
141 sits the inner driver cups 125 and 126. The outer drivers 120 and 121
press the inner drivers 122, 123 against the protruding leg of the inner
driver 122 and 123, and the force of the outer drivers 120 and 121 push
the inner drivers 122 and 123 into the cups 125 or 126. The magnets 124
and 135 are sheared apart during this movement. The outer driver 120 or
121 then continues to move with respect to the inner driver 122 or 123,
and the pivoting magnet is repelled by the inner driver's magnet 135 (see
FIG. 70).

[0230] In this state, the outer driver 120 or 121 can either drive away
quickly (above a critical speed and the magnets being in a repelling
state) and leave the inner driver 122 or 123 behind (see FIG. 71), or
drive back slowly (below a critical speed and the magnets being in an
attraction state) and pick up the inner driver 122, 123 allowing the
magnets 124 and 135 to align and attach (see FIG. 72). The magnets 124
and 135 will re-align depending on the speed with which the outer driver
120 or 121 moves with respect to the inner driver 122 or 123 and which
relative orientation of the magnets are in.

[0231] In the embodiment shown in FIGS. 64-77, when the outer drapery is
in the open position and the inner drapery is left closed, the inner
drapery is free to be operated manually.

[0232] Magnets 124 and 135 are sufficiently weak such that as soon as the
magnets start pulling the inner drapery to open, the force overcomes the
magnetic attraction of the magnets, disengaging magnet 124 from magnet
135, such that the outer driver 120 or 121 slides forward a small
distance and engages the inner driver hook 138 moving the inner driver
122 or 123 to travel the rest of the distance to open the inside drapery
(see FIG. 73).

[0233] At the point when the user wants only the inner curtain closed,
both the inner and outer curtains are moved back towards the center and
the position where the curtains are fully closed and hard stopped (see
FIG. 70). In this position the two magnets 124 and 135 are mechanically
separated with the inner driver 122 or 123 pushed into the cutout in the
track 141 and in the cup 125 or 126 with the swivel magnet 124 turned
approximately 180 degrees from the stationary magnet 135. Also, in this
position, as the inner driver 122 or 123 with the hook 138 and stationary
magnet 135 are pushed into a plastic cup 125 or 126, the inner driver
122, 123 is shifted out of the pathway of the outer driver 120 or 121
that is holding the swiveling magnet 124. Accordingly, when it is desired
to return the outer curtain to the open position and leave the inner
curtain closed, the outer driver 120 or 121, which is attached to the
outside curtain, can be moved fast enough with respect to the inner
driver 122, 123 that the swiveling magnet 124 does not have enough time
to attract the inner driver 122 or 123 with the stationary magnet 135,
and, consequently, the magnet 124 and the magnet 135 does not get
attached and the inner curtain is left behind in the closed position.

[0234] In another specific embodiment, the structure of the assembly shown
in FIGS. 64-77 can be reconfigured such that the outer curtain is left in
the closed position when the inner curtain driver is moved at a speed
above the critical speed past the outer curtain driver to open the inner
curtain and leave the outer curtain in the closed position. Such a
modification can be applied to center open, right open, and left open
curtain systems. Such an embodiment can have a sheer curtain as the outer
curtain and a blackout curtain as the inner curtain, or other pairs of
curtains, as known in the art. Having the sheer curtain as the outer
curtain can allow the curtain system to take up less space, e.g. protrude
away from the window a smaller distance, and also allow the sheer curtain
to close with the blackout curtain and allow the blackout curtain to be
closed with the sheer open.

[0235] The features described herein and the features illustrated in FIGS.
64-77 can be used to create one or more of the following: A system for
the horizontal movement of at least one set of at least two vertical
curtains or draperies that have a common drive element driven by the
rotation of a helix in the outer surface of a rotatable tube applying a
horizontal movement force on at least one drive element attached to the
drapery and guided by at least one guide rail, where there are at least
one drive attachment element and magnets are used to select the draperies
to move.

[0236] A system horizontal movement of at least one set of vertical
curtains or draperies, where the drive element is a rod.

[0237] A system horizontal movement of at least one set of vertical
curtains or draperies, where the drive element is a tube.

[0238] A system horizontal movement of at least one set of vertical
curtains or draperies, where the drive element is motorized.

[0239] A horizontal moving set of curtains or draperies made from
dissimilar materials and can be operated individually with a common
rotating drive system.

[0240] A system for the horizontal movement of at least one set of
vertical curtains or draperies, where the drive section of the rotational
drive element has at least one helix formed into the outer surface.

[0241] A system of motorized horizontal movement of at least one set of
vertical curtains or draperies, where the motorized unit is battery
powered and has a wireless receiver on the control board.

[0242] A system for the horizontal movement of at least one set of
vertical curtains or draperies, where a manual operation is provided with
a pull cord that rotates the rotatable drive member.

[0243] A system of motorized horizontal movement of at least one set of
vertical curtains or draperies, where the motor is positioned internal to
the drive tube.

[0244] A system of motorized horizontal movement of at least one set of
vertical curtains or draperies, where the power supply is positioned
internal to the drive tube.

[0245] A system for the horizontal movement of at least two sets of
vertical curtains or draperies by the rotation of a helix in the outer
surface of a rotatable drive element applying a movement force on a
toothed drive attachment element for moving the draperies, where there
are at least one drive attachment element and multiple non-driving
attachment elements that are guided by at least one guide rail and
suspend the draperies.

[0246] A system for the horizontal movement of at least two sets of
vertical curtains or draperies by the rotation of a pitch thread
mentioned above where there are at least two pitch threads, one being
formed clockwise and one being formed counter clockwise and the drive
tooth in the drive attachment element and the lead attachment element is
angled to maintain engagement with the drive tube.

[0247] A system of motorized horizontal movement of at least two vertical
curtains or draperies, positioned on different portions of the drive
element, by the rotation of a pitch threads, where a single motor moves
curtains on a first portion of the drive element and curtains on a second
portion of the drive element in opposite directions.

[0248] A system of motorized horizontal movement of at least two vertical
curtains or draperies by the rotation of a tube with a formed pitched
thread, where a power supply can be external to the tube and enters
through at least one of the support shafts.

[0249] Aspects of the invention, such as controlling the motor, may be
described in the general context of computer-executable instructions,
such as program modules, being executed by a computer. Generally, program
modules include routines, programs, objects, components, data structures,
etc., that perform particular tasks or implement particular abstract data
types. Moreover, those skilled in the art will appreciate that the
invention may be practiced with a variety of computer-system
configurations, including multiprocessor systems, microprocessor-based or
programmable-consumer electronics, minicomputers, mainframe computers,
and the like. Any number of computer-systems and computer networks are
acceptable for use with the present invention.

[0250] Specific hardware devices, programming languages, components,
processes, protocols, and numerous details including operating
environments and the like are set forth to provide a thorough
understanding of the present invention. In other instances, structures,
devices, and processes are shown in block-diagram form, rather than in
detail, to avoid obscuring the present invention. But an ordinary-skilled
artisan would understand that the present invention may be practiced
without these specific details. Computer systems, servers, work stations,
and other machines may be connected to one another across a communication
medium including, for example, a network or networks.

[0251] As one skilled in the art will appreciate, embodiments of the
present invention may be embodied as, among other things: a method,
system, or computer-program product. Accordingly, the embodiments may
take the form of a hardware embodiment, a software embodiment, or an
embodiment combining software and hardware. In an embodiment, the present
invention takes the form of a computer-program product that includes
computer-useable instructions embodied on one or more computer-readable
media.

[0252] Computer-readable media include both volatile and nonvolatile
media, transient and non-transient media, removable and nonremovable
media, and contemplate media readable by a database, a switch, and
various other network devices. By way of example, and not limitation,
computer-readable media comprise media implemented in any method or
technology for storing information. Examples of stored information
include computer-useable instructions, data structures, program modules,
and other data representations. Media examples include, but are not
limited to, information-delivery media, RAM, ROM, EEPROM, flash memory or
other memory technology, CD-ROM, digital versatile discs (DVD),
holographic media or other optical disc storage, magnetic cassettes,
magnetic tape, magnetic disk storage, and other magnetic storage devices.
These technologies can store data momentarily, temporarily, or
permanently.

[0253] The invention may be practiced in distributed-computing
environments where tasks are performed by remote-processing devices that
are linked through a communications network. In a distributed-computing
environment, program modules may be located in both local and remote
computer-storage media including memory storage devices. The
computer-useable instructions form an interface to allow a computer to
react according to a source of input. The instructions cooperate with
other code segments to initiate a variety of tasks in response to data
received in conjunction with the source of the received data.

[0254] The present invention may be practiced in a network environment
such as a communications network. Such networks are widely used to
connect various types of network elements, such as routers, servers,
gateways, and so forth. Further, the invention may be practiced in a
multi-network environment having various, connected public and/or private
networks.

[0255] Communication between network elements may be wireless or wireline
(wired). As will be appreciated by those skilled in the art,
communication networks may take several different forms and may use
several different communication protocols. And the present invention is
not limited by the forms and communication protocols described herein.

[0256] All patents, patent applications, provisional applications, and
publications referred to or cited herein are incorporated by reference in
their entirety, including all figures and tables, to the extent they are
not inconsistent with the explicit teachings of this specification.

[0257] It should be understood that the examples and embodiments described
herein are for illustrative purposes only and that various modifications
or changes in light thereof will be suggested to persons skilled in the
art and are to be included within the spirit and purview of this
application.

REFERENCE NUMBERS

[0258] 1 dual curtain assembly

[0259] 2

[0260] 3 outer driver carrier
attachment post

[0261] 4b first inner drive tooth

[0262] 4a second inner
drive tooth

[0263] 5

[0264] 5a first outer drive tooth

[0265] 5b second
outer drive tooth

[0266] 6 outer carrier attachment post

[0267] 7 motor
control circuit board

[0268] 8

[0269] 9 inner drive element

[0270] 10
drive element

[0271] 11 support guide

[0272] 12 outer curtain carrier
track

[0273] 13 rubber mounting disk

[0274] 14 pin hook

[0275] 15 inner
driver stall area

[0276] 16

[0277] 17 S hooks

[0278] 18 axles

[0279] 19

[0280] 20 curtain assembly

[0281] 21 batteries

[0282] 22 drive element

[0283] 23 right outer curtain drive attachment element

[0284] 24 helical
guide structure

[0285] 25 right inner curtain drive element

[0286] 26
outer surface

[0287] 27 motor drive adapter

[0288] 28 slip ring

[0289] 29
inter-curtain engager catch

[0290] 30 pull cord

[0291] 31 inner carrier
attachment post

[0292] 32 motor assembly

[0293] 33 rotation assembly

[0294] 34 window

[0295] 35 motor end

[0296] 36 driver attachment element

[0297] 36A outer driver attachment element

[0298] 36B inner driver
attachment element

[0299] 37 loop

[0300] 38 clockwise helical groove

[0301] 39 Loop

[0302] 40 counter clockwise helical groove

[0303] 41

[0304] 42 Center

[0305] 43 external power supply

[0306] 44A outer curtain

[0307] 44B inner curtain

[0308] 45 wall bracket

[0309] 46 center closing
curtain

[0310] 47 battery sleeve

[0311] 48 left panel

[0312] 49
intercurtain engager

[0313] 50 right panel

[0314] 51 end cap

[0315] 52
Axles

[0316] 53 motor housing

[0317] 54 end brackets

[0318] 55 aperture

[0319] 56 outer diameter

[0320] 57 bearing housing

[0321] 58 motor end

[0322] 59 bearings end

[0323] 60 longitudinal axis

[0324] 61 inner tube

[0325] 62 driver tooth

[0326] 63 sleeve/outer tube

[0327] 64 non-driven
end

[0328] 65 fractal antenna

[0329] 66 driven end

[0330] 67 idler
attachment element

[0331] 67A outer curtain idler attachment element

[0332] 68 attachment point

[0333] 69 outer curtain carrier

[0334] 70 draw
rod

[0335] 71 outer tooth drive

[0336] 72 pull cord

[0337] 73 inner tooth
drive

[0338] 74 left driver attachment element

[0339] 75 o-ring

[0340] 76
right driver attachment element

[0341] 77 outer drive tube

[0342] 78 left
draw rod

[0343] 79

[0344] 80 right draw rod

[0345] 81 inner curtain
carrier track

[0346] 82 motor

[0347] 83

[0348] 84 batteries

[0349] 85

[0350] 86 battery tube

[0351] 87 motor output shaft

[0352] 88 first lead
tooth

[0353] 90 second lead tooth

[0354] 91 ball bearing

[0355] 92 motor
drive adapter

[0356] 93 inner curtain carrier

[0357] 94 bearings

[0358]
95 finial

[0359] 96 remote control

[0360] 97 receiver for draw rod

[0361]
98 button

[0362] 99 receiver for hook

[0363] 100 outer driver stall area

[0364] 101 battery tube

[0365] 102 battery

[0366] 103 spring

[0367] 104
battery tube end cap

[0368] 105 o-ring

[0369] 106 battery tube wall
bracket

[0370] 107 battery tube connector cap

[0371] 108 s-hook

[0372]
109 mounting bracket

[0373] 110 bracket clip

[0374] 111 cover track

[0375] 112 track end plates

[0376] 113 fasteners

[0377] 114 tube CW

[0378] 115 tube CCW

[0379] 116 inner driver hanger clip

[0380] 117 outer
driver hanger clip

[0381] 118 inner hanger clips

[0382] 119 outer drapery
clips

[0383] 120 outer driver CW

[0384] 121 outer driver CCW

[0385] 122
inner driver w/magnet CW

[0386] 123 inner driver w/magnet CCW

[0387] 124
swivel magnet

[0388] 125 inner driver cup CW

[0389] 126 inner driver cup
CCW

[0390] 127 tube cap center bearing

[0391] 128 center bearing

[0392]
129 drive gears and shaft assembly

[0393] 130 drive shafts

[0394] 131
drive shaft retainers

[0395] 132 end tube bearing housings

[0396] 133
antenna assembly

[0397] 134 end tube caps

[0398] 135 stationary magnet

[0399] 136 groove in tube

[0400] 137 driver protrusion

[0401] 138 inner
driver hook

[0402] 139 end bearing assembly

[0403] 140 end plate extruded
hole

[0404] 141 cutout in track

Patent applications by Daniel T. Matthews, Pensacola, FL US

Patent applications by Michael D. Fox, Pensacola, FL US

Patent applications by Willis Jay Mullet, Gulf Breeze, FL US

Patent applications by HOMERUN HOLDINGS CORPORATION

Patent applications in all subclasses Roll and hanging or drape type only